Magazine had the 05 mustang on the cover and they were talking about the first one in the 12's lol. So I guess someone already has one running 12's :-D
Autoweek has a great one on the GTO vs Mustang. They ran both of them(the 400hp GTO). The times were about the same, with a 14.0 for the stang and something like 13.7X for the goat. Its typical mag numbers because I know people who run stock faster then that. Anyway, they overwhelmingly picked the stang for every single catagory, especially handling where the GTO fared particularly terrible.