It is faster for large programs. For small programs, I think Python is great but you also have to consider that there is no such thing as prototype code and a small script (usually but not always) balloons into something more involved than was originally intended.

THAT is where Haskell shines, the ability to refactor and expand fearlessly and aggressively.

I think for large or complex programs Haskell is much faster for constructing a skeleton because it's usually not the logical operations that trip us programmers up, it's the data flow and correct alignment of types, which are implicit in a dynamically typed language and explicit in Haskell.

So, it's kinda-sorta like writing your ideas down in a structured language which enables you to "see" the abstractions in a rigorous light, then the ability to refactor aggressively and safely kicks in so once you can see your abstractions you can quickly adapt for better ones.

So I think the initial work is made quicker in that it forces you to excogitate then because it's in some concrete form you can see it clearly and take advantage of quick turnaround time in refactoring.