I'm not sure why you think there is little research on personalized medicine in the US? There is tons. It's just turning out to be much more difficult than was originally hoped (see: results from GWAS studies, etc.).
Sorry, I was unclear. What I meant was that we don't seem to be going all-in on it like the Chinese are. I don't think we can do personalized medicine now, because we don't have sufficiently large sample sets for comparison or sufficiently fast comparators. And i know there is a lot of research going on to improve that, but don't feel we are being sufficiently aggressive about it.