For me at least, there are two thoughts (including mine) at the corresponding question on quora: http://www.quora.com/How-is-Hadley-Wickham-able-to-contribute-s

For me at least, there are two thoughts (including mine) at the corresponding question on quora: http://www.quora.com/How-is-Hadley-Wickham-able-to-contribute-so-much-to-R-particularly-in-the-form-of-packages http://www.quora.com/How-is-Hadley-Wickham-able-to-contribut...