Not a great deal is the correct answer, if every girl had every punt reviewed and every one was a bad review then it would have to be a resounding YES, the truth is, as we all should realise that there are girls who've been working for a year without a review on UKP, do we think they haven't had any customers? Do we think every punter has read every reviews? What percentage of any punts were with UKP users who've done their research?
There's a tourer in my area who registered on AW in 2017, she has two reviews and a couple of "any intel on..." Think about it, in four years with presumably 2 punts a day, 10 a week, that's 2000 punts, but only two reviews, I appreciate there will be some who use the site but don't contribute but realistically it must be something like 75-90% of those punts were not with people who'd checked on here. And there are some really badly reviewed WGs who are still making a good living.
None of us would be happy with a poor review, I'm sure many of us have been disappointed with some sort of appraisal by somebody at work, but we either shrug it off or convince ourselves that they were wrong, how many of us would turn up at work half an hour earlier to make a good impression for a dickhead boss?