Yeah, whether there are more Brazilian women or not, they definitely seem to make up a higher proportion of the SP pool than a few years ago.
My experience of Brazilian SPs has been the complete opposite of my experience with Romanians. Maybe I've just been lucky a few times, but I do get the feeling they have a much more professional attitude towards it, and understand the "service" part of "service provider". I've often come away feeling like I've had a pampering session rather than just a quick shag.
The only negative thing is that there's perhaps a higher likelihood of cosmetic surgery with Brazilian SPs, particularly boob jobs and Brazilian butt lifts (fancy that), so if that's not your bag, then that can rule a lot of them out. But I don't think I've ever felt cheated by a Brazilian SP the way I have with Romanians.