My sister participated in the New York Teaching Fellows program (similar to TFA) and worked in Spanish Harlem and her experience was much the same as the author's. So I'm not saying the current situation and the current programs are ideal or well managed, but there are interesting hope-inducing projects and people out there.
p.s. Go watch season 4 of The Wire and see if it tugs at your heartstrings a bit. It also paints a good picture of how screwed up the school system itself is in poor urban communities. Not to mention how pedogogical innovation is treated in the academic setting...
p.p.s. If you're curious about the role of academic philanthropy and the Broad Foundation which the author mentions, have a read: http://dissentmagazine.org/article/?article=3781 . I haven't read a counterpoint to that piece yet, so I'm not sure how well the criticisms stand up.