Yep. There is a definite culture difference between the iOS and Android communities. Generally speaking, iOS "Just Works(tm)" for what most people want to do. There aren't very many surprises and everything works like expected. But then, if you want off of the beaten path, it's often difficult (or impossible) to do that. Android, meanwhile, is inconsistent and often unintuitive. It also has a lot of ways to do the same thing. Combine this, and it's natural that a community would form around helping each other out. But then you can take it even farther. Android carries on a long Open Source tradition of allowing people to do whatever they want. This brings in the hordes of people that want to find the latest and greatest new thing that they can do, and communities form around that.
iOS forums mostly focus on rumors because what else is there to talk about? Everybody already knows how to do everything it does and the answer to "how to I do alternative X" is usually "you can't".