Is the language really that important to the end product? I know we like to write in our favourite languages or the language we think in, but when you use software daily, do you only use software written in C, for example? Do you refuse to use anything written in C++?
Not directly, but very possibly indirectly because of the people a new language attracts: PG already touched on it: http://www.paulgraham.com/pypar.html