It's not that the NY Mag article was particularly pro-Wall Street. It's that it wasn't anti-Wall Street enough. The Wall Street types quoted in NY Mag blamed financial reform for their declining revenues, when (as Taibbi points out) it's actually the European crisis that's doing it.

Taibbi writes with a fairly angry tone, but he's got the facts to back up the bombast (and those facts are plentiful in his post).