Given the size of UKP, and provided she's not based in the middle of nowhere, I think it would be unlikely that she hasn't seen guys from here. In fact, we already know that she has seen at least one... you! Whether those guys are active members, reviewing often or not, is another story. Because, let's face it, most of the members here don't bother with posting let alone reviewing.
We also do tend to be selfish bastards when we find someone we really like. Because revealing a hidden gem may not be in our best interest, as prices may go above what we're prepared to pay, she may become harder to book, or maybe she just doesn't like us that much and we might get the boot in favour of better prospects.
I hardly ever TOFTT, so most girls I see have been reviewed here, although not necessarily by me. But I'd say if you've taken some useful pointers from UKP it's only fair to give back. By all means, have your fun with this gem, but do share with the rest of us!