This is also my experience! I received a very warm welcome when I first started with Haskell. You could ask all sorts of questions on #haskell and always receive great answers. The regulars were really happy when they were able to help you.
Also they were not dismissive at all in view of my background in dynamic programming languages. In fact, several members of the Haskell community were quite interested in Pugs, the experimental Perl 6 platform which we built in Haskell in those days, to the extent that they joined our effort and became committers. :-) There was quite a bit of cultural exchange happening.
The legendary #haskell troll attempt, recorded at https://gist.github.com/quchen/5280339, is worth reading.
Partly to pay back the kindness I received back then, and partly just because it's so much fun, I participate in free regional Haskell workshops. If you are located near Augsburg, Germany feel invited to attend! Details are at http://curry-club-augsburg.de/.
> if you are a fan of dynamic/gradual typing, objects, distributed systems, etc. do not expect a warm welcome.
I have not experienced this, but this might be because when I'm participating in the Haskell community I mostly talk about Haskell. I'm a fan of Python and Elixir, and haven't kept these facts secret as I've participated in the Haskell community (including a local meetup who's organizer is also a fan of Erlang/Elixir), and nobody has singled me out to bully me because of this. Nobody even notices.