There was a large discussion earlier about the subject. I posted detailed comments in that thread so I won't repost but just link. http://news.ycombinator.com/i

There was a large discussion earlier about the subject. I posted detailed comments in that thread so I won't repost but just link. http://news.ycombinator.com/item?id=1143317 http://news.ycombinator.com/item?id=1143317