The first reviews are out for Madden 13 on the Vita, and having heard some grumblings based on the demo, I'm not too surprised to see that they're a mixed bag.
We have a fairly detailed review from GamrReview giving it a 7.8/10, GamerHub has a poor semi-literate review but still manages to give the game a 3.5/5. FanBolt seems a bit less impressed giving it a 6 out of 10
I'll add more reviews as they show up, but on the whole (and for a first effort) this doesn't seem a bad effort from EA Sports, but it'll have to be on a par with the features of the console versions come 14.
You can find the game's Trophy list here.