Syntax matters. What I really like about Haskell is how much care has been given to the syntax to make functional idioms easy to read and write. One can just say,
fib = 0:1:zipWith (+) fib (drop 1 fib)
[I know that `drop 1` is just `tail`, but this one makes the intent clearer for those who may not know Haskell].
You can often get close to Haskell-y implementations in Python with help from the itertools module. There are a couple "Haskell style" Fibonacci generators with itertools floating around in blog posts, I'm sure, and I've used itertools to write all sorts of things in a pretty succinct manner.
