How much of the forum have you read to come to that conclusion? There's discussion of all sorts here, at all price ranges.
Morning..I can see your point on some level
but think the person who questions agency thread based on (cheap and cheerful) being order of day here is fairly correct, though have to add, there is nothing wrong with this being possibly accurate, there is a lot of greatness out there for a reasonable small charge, times are hard,frugal,etc.
There are agencies who send girls out on outcalls for £120 an hour which for many here may be very reasonable, but at the same time, many more agencies may wish to squeeze every last drop out of a punter/client, so will charge stupid amounts.
In response to actual thread question,the set up is fine has it is, an agency girl can be reviewed in the review section as any other girl.