I think there are always times when there are more bad reviews and times when there are less. If you just flipped 3 out of that lot it would look perfectly normal.
If you look at any member with more than 10 reviews, how many are positive, if they are lucky just over half or more. Nothing has changed, what I do object to is some price increases have meant I won't see a girl now.
I did wonder a while back wouldn't it be handy if you had a +ve/-ve review stat for punters. The downside is having a more negative overall being seen as better quality reviews and people forcing negs. I agree with your point though, if somebody has a number of reviews and there are very few negatives I often feel inclined to dismiss them all.
I think of my own reviews something like 25-30% are negative but that doesn't really reflect my punting experience. The better ones get 2 or 3 visits, sometimes more, while the bad ones will just get the 1. I've seen some of the most reviewed girls in the region with well into double digit reviews - there is no point reviewing them and I have nothing much to add, or I feel tagging comments onto somebody else's review is adequate.