Note - This is a migration of content from my old blog.
It looks like the report mentioned by Guido is now available. It meantioned that {"programmers are 5 times more productive when using "P" languages"}
Here is a writeup on the report. On a side note, I've been playing around with PHP a little bit. Some things that are bothering are references (in version 4, 5 fixes this) and classes which seem like an afterthought.