I take your point here, I can see US cities and states fit well in .us. However, you have to admit that when I cherry picked, I showed a big disparity between .info and .us but when you cherry picked it was less pronounced. Also, with .us, you are tied to US geos so there are only a couple of hundred possible $XX,XXX keywords. If .us works better with US geo keywords, you are looking at a niche of a niche and .us shouldn't really be ranked a close second to .info on that basis, the reality is that globally it is a long way behind when all keywords are taken into account.