Is when a guy writes a glowing review and gives a low performance score:  "She tongued my ass, squirted all over my face, two long lost yadayada, then she painted my house and washed my car."   5 - Needs to work on it.

I know usually the whining is about grade inflation, which is annoying, but in the other direction, when I think about what some of these gals do in an hour, seeing a low score can be sort of incongruous.

Misery loves miserable company

BP and other ad sites have pictures.  Some guys believe that their YMMV.  Also, many of the lower rated providers have lower prices and its also a financial consideration.

I am consistently amazed that some providers score 6 - 6 on one review and the 8 - 9 on the next.

The simple truth is different days can be better or worse.  Chemistry is always intangible.  

Perhaps, like me, they have found almost no correlation between ratings and performance.  And yes, just because I have no reviews and don't waste money on VIP (see above) I have been doing this for years ans have seen more SPs than most of you....