It depends what you're looking for. There's tons of information, but you need to be specific in searching, or sift through a lot of it. It's great to see what a pattern will look like when knit, or what a yarn looks like in a porjcet.
I am active in the groups, mostly the ones on specific techniques, and several on my 'don't miss' TV shows. I only use Yarn, Patterns and Techniques of the main big 6 groups that everyone gets subscribed to. Those 3 don't get nasty very much, and if they do, a mod will shut down a thread.
sue- knitting heretic