Marco Arment, John Siracusa and Casey Liss had a lengthy discussion about this in two last episodes of ATP[0] (but mostly in #54[1] and some follow-up in #55[2]).

[0]: http://atp.fm

[1]: http://atp.fm/episodes/54-goto-fail

[2]: http://atp.fm/episodes/55-dave-who-stinks