Totally get what you say bro, but frankly , the reviews do not back up your arguement in terms of price to positive experience ratio. There could be many reasons for this but the data is there for all to see.
Be careful how you anal-ise your data.
If the question is "I wanted to buy a sky blue '73 Ford Escort" then the cumulative vague experience is fairly easy to determine and may prove consistent across all subjective observations.
If the question is "I wanted to buy a fast vehicle" then the cumulative vague experience is not easy to determine.
Why I might badger a brief reviewer for details is because saying "she was fit and I fucked her in various positions" tells you next to nothing about the SP.
Even when the more verbose go on to say "she was nextdoor pretty, C cups, 5'3", brunette, Hungarian and she goes like the clappers" there are only a couple of reliable data points there in hair colour and nationality.
One man's vanilla punt has been shown to be another's fairly adventurous, some are very content with vanilla (mish, doggy, OW, cum in condom, lip kissing optional) others find vanilla (almost) a turn-off.
Unless you've been profiling us all without disclosure then summarising at the level you have is shaky.
Collectively we have seemingly found that SPs operate in the mode (possibly mean and median) as follows (order does not indicate preference or promotion):
Dodgy, outcall @ 100 ph where the pics show hotties, empirical comparison between their pics and "Diva" level a la master-promoter KT, services likely not as advertised, girl not as advertised, minder in car outside, more likely than not to be ropey sitch.
London incall agency - (Thai) Asian: 150ph, photoshopped pics, "girls" probably cis-gendered, probably enhanced, probably not as sleek or taut as shown, usually obliging/"enthusiastic" for "vanilla" + OWO + Anal + RO + fingering + COBreast/Body/Ass + CIM (spit rather than swallow) + prostate + rimming + (D)FK + tit-fucking. Services typically as advertised. SPs older than advertised, likely 30+. Phone fiddling not usually a problem. May be getting a bit more precious with the dick cleaning before/during OWO. OWO "tricks" often available (e.g. hot/cold water, ice cubes, tea, alcohol)
London incall agency - EE: 150ph, photoshopped pics, cis-gendered, more options for natural tits, usually as sleek but not as taut and natural tits may not be as big, nationality not always as declared. Usually good for vanilla + (D)FK + fingering +OW, increasingly OWO/CIM + RO may be at discretion and possibly extra i.e. not guaranteed depending on moody cow, backdoor shenanigans also more variable than Thais. Enthusiasm (when not moody) as good as Thais. Services not as consistently (as Thais) as advertised. CoBody/Breast/Ass usually available but again moody cow syndrome and may be more prompt to wipe up. Girls usually as young as advertised and clearly under 30. Phone fiddling a possibility and moodiness ensues if you comment.
London incall agency - "Latin": 150ph - photoshopped pics, most contended about original gender, almost guaranteed fake tits, possibly fake ass, possibly lips done, usually not as taut/sleek as pics, nationality questionable, age close to advertised and usually under 30. Phone fiddling a possibility and moodiness ensues if you comment. Usually good for vanilla + (D)FK + fingering + OW, again OWO/CIM + RO may be at discretion and in that case more likely "esstra baby", ass play and backdoor fun perhaps more likely than EEs but not necessarily as obliging as Thais. CoBreast/Body/Ass usually available.
London agency - "premium": 200+ ph - photoshopped pics a (little) more "honest", usually original gender as advertised, good choice for natural or fake tits'n'ass, services usually more reliably delivered as requested and usually with gusto, increasingly so with price. Moodiness and phones should not be an issue. Perhaps younger girls at this price point are more unreliable than the veterans who've graduated to it but they are possibly "hotter" in looks. Entering the realms of you get what you pay for.
London Non-Brit indie @ 80-100ph - highly variable honesty of pics, services beyond vanilla variable, moodiness variable, "at discretion" and extras likely and often follows nationality types above. Defines the meaning of punting.
London Non-Brit indie @ 120-150ph - still variable honesty of pics, services more reliably as advertised than cheaper brethren, more services included but no guarantees of Thai level smorgasbord. The "wealthier" punter's launchpad.
London "Brit" indie @ <120ph - probably a hoax/scam, especially if "fit" and young but luck sometimes struck.
London "Brit" indie >150ph - probably as advertised looks wise, variety of services beyond vanilla variable but usually as advertised but be wary, enthusiasm variable. Again good eggs to be found but still too many bad/going off to be a reliable bet if punting rather than tapping regulars.
Not mentioned facials as not my thing and therefore not noticed if more or less likely or enthusiastically received by any sort.