Well they certainly have team quality, something that a lot of nations lack,but in terms of individual quality the US is still behind.
The best player you have is probably Jermain Jones or Dempsey. Neither of which are world class talent. While if you compare with smaller(Football wise) European sides like Wales (Bale, Ramsey), Poland (Lewandowski, Kuba, Pisczek), Serbia (Matic, Ivanovic, Vidic) and Sweden (Zlatan) still have major talent spread across them.
So yeah, whilst being a pretty decent team, they just don't have the quality to be anything else.