I'd say the girls are definitely real, with just a cursory glance you can find most on other escort websites, including:
Emily - on multiple other sites with several FRs
Jessie - eg here
Erica - uses the name Monica more often
Nelly - also uses "Noelle"
Isabel - regular on a lot of sites under that name, etc
Some of the reviews on the girls date back to 2008
, so assuming that the website is relatively new (dated 2011 at the bottom), I'd guess it's an established agency setting up another site to get more exposure (Eternity Girls?).
All the details (stats/rates etc) seem about on the mark...