In my area almost all EE's are Romanian.
That's the big problem, the Romanians tend to follow a set path during a punt and it is usually a pretty limited and formulaic service. On the other hand the Polish girls I've seen have tended to be much better and I've had some excellent punts with them, problem is they don't tend to tour my area as much as they did up until last year. We're left with a lot of Romanians unfortunately.
The OP's post, the EE girls are a bit cheaper than English, maybe 20 - 40 quid an hour, at least in East Anglia anyway. As far as I can see the English girls are more expensive purely because they are English, not because they guarantee better service.