I disagree; I think, at the time, functional programmers were primarily using OCaml and various lisps. This is purely anecdotal, mind you, and haskell was definitely on the FP radar big time.
I dunno. I remember it being all over LtU and most every programming language discussion was that or scheme, but always treating Haskell like it was the ideal (and it had become default on research papers instead of OCaml)