Paul Graham said that his company could implement features faster than his competitors, because his company programmed in Common Lisp and Common Lisp makes you twice more productive as a programmer. (2)
Time passes, progress happens, Common Lisp was the fastest, a more modern programming language is the fastest, so today what programming language is the fastest to implement features? Why?
(1) http://slashdot.org/index2.pl?fhfilter=political+axis (2) http://www.paulgraham.com/avg.html