What's also interesting is small proportion of Thai's compared to the number of Thai restaurants. It appears that there as many Thai restaurants as Vietnamese restaurants despite far lower Thai immigrant populations.
Vietnamese restaurants are catching on in places. But despite the large Filipino-American population, are there any Filipino restaurants anywhere? Then again, is Filipino food any good? lol
At least in my area/personal experience, Thai restaurants started catching on about fifteen years ago, Vietnamese places started becoming big about five years ago, and Filipino restaurants are finally starting to open, though they're still rare. All three are pretty good imo, but I'd probably go Vietnamse>Thai>Filipino