My personal, completely unscientific guess is that Phantom owners will be skew slightly towards PS/XBox thumb-style controls, while the "old skool" RC crowd will be relatively more "pinch-centric" (but not by a huge margin).
I've found that for me, the pinch offers more precise, quicker response, but it feels alien and less comfortable than the thumbs-only control I'm used to. And there are guys like Tareq Al Saadi who prove beyond a shadow of a doubt that being all thumbs doesn't mean you're all thumbs:
[youtube]http://www.youtube.com/watch?v=BgECnfhJlTI[/youtube]