This topic has been debated on here at infinitum.  Ratings are subjective.  A 7 rating is attractive, seems reasonable to me.  You have no idea how many hobbyists rate attractive ladies 9 or 10.

I believe when hobbyists write a review, there are many factors, maybe subconsciously running through the minds of some;

1)  some may think, they must be loyal to this provider as she put herself out there and provided a very personal service for them.  Maybe being a bit more liberal than they otherwise may be.

2)  others may think, they must be loyal to other hobbyists, for in fact that is an underlying premise to this site, sharing accurate information for those who shared their experiences.

3)  then some may inflate their rating because they do not want a low rating to reflect on the quality of providers they seek.

4)  there is the payback review where a hobbyist feels he was wronged in some way or other and uses the review as payback.

But all in all, it is my opinion that the truly inaccurate reviews or those written with an ulterior motive stand out like a sore thumb.  When we see a provider with a very high number of reviews and all were positive except one or two, we can not help but wonder.  Either the provider had a bad day, or the anomalies reflect more on the reviewer than the provider.

Apparently there is no wrong answer.  My humble advice is, just try your best to be fair, and rate as honestly and fairly as possible.  Remember these ladies are putting themselves out there and deserve every benefit of the doubt.