There were so many outstanding releases that picking just a handful strikes me as pretty arbitrary. Given that, I think TA's list is pretty good. I have played 4 of the 5 games (I have not played Devil's Attorney), and enjoyed those four. I would not include Super Hexagon anywhere in my list for precisely the reasons put forth by Exact-Psience and the fact that it was a bit too hardcore for me. Of TA's list, my favorite was 10000000.
My general preference would be for TA to list perhaps the 25 best games, and broken out by genre. In any case, I found many many games IOS games released on 2012 to be fantastic. It was a great year to be an IOS gamer!