This is a wrong impression. It is not true and has never been true. AW search, Thai, outcall, within 5 miles = 10 results. And this is the desert where I live. All the London Thai speciality agencies have many escorts that do outcalls - almost all will do outcalls from a quick scan of profiles. Ok, Thai massage girls normally don't do outcalls, but nor do any other massage girls. (And I know I can't go back in time and do the search 10 years ago to compare, but I have no impression of change and I have using AW a fair few years 'ahem')
Beyond that, I find these general questions on race or nationality unhelpful and likely to mislead. Are all Romanians grumpy? Are all Russians cold? Are all Brazilians whatever? No no no. The difference between one escort and the next is many times greater that the commonalities between a nationality. About the only common ground I find is room mates tend to be similar, and agencies seem to end up with the same sort.
