I can't say I am 100% sure, but I'd imagine they are lurking around and about. :]
I think it's very likely people from Larian Studios are lurking these forums. They probably keep a low profile to avoid lots of people asking for their attention to get their ideas into the game. However, if an idea is good I think they will discuss it in the back room. Especially if the idea is backed by many.
Quite a few changes from the initial EA release has been done after feedback from the players. So they DO listen, but we won't know when and what they will address. So don't expect a reply from a Larian Studios person in this forum about suggestions made to the game.
