What gives?  Check this out.  A review of Davee from 1/30/07 on the Philly board rec'd a "10" on performance:


After getting to know each other, davee started to undress and ask me to do the same. She immediatley began to kiss me on the lips passionatly. I really felt the gfe with this hottie. after a few min of french she began to massage my hard cock and immediately began to give me a bare back blowjob. I could hardley contain myself when she quickley put a condem on my cock and slide it in her shaved pussy.. She let me fuck her in many positions and finally pulled off the condom and suck my cock off in her mouth to complete satisfaction. It was the best blow job I ever had, hands down!

Yeah, I saw that one too and just shook my head.  The numbers are meaningless.  You really have to read the reviews

That one pissed me off also.  It's almost like she got a 10 because she was high priced.