Try playing Law or Xiaoyu in SFxT and tell me AA is easy. I'd much rather hit a smoke standing 2 in person than either of their AAs. Also, SF4 doesn't have many juggles, but SFxT has plenty (again, Law). And there's just as much activity in sfxt as mk9 so they can't use that as an excuse.
Well, the point is that with my internet I can play sfxt perfectly fine while playing mk9 is like playing under water.
I realize that I'm coming across as a capcom fanboy in these posts, but it's mostly that I'm just so frustrated by mk9's online. MK9 is my favorite fighting game of all time but I end up playing sfxt way more just because it gives me such a better online experience