Goodreads has never made more than a blip on my radar, because I just haven't had time to look into another on-line community. After reading YA novel readers clash with publishing establishment in The Guardian, I wish I knew more about it.
I have wondered if the publishing establishment doesn't try to use the independence of the Internet (Actually, it seems pretty obvious it does, with all the encouragement that authors take advantage of social media.), and lines like this support those thoughts: "More and more bloggers are reluctant to host the author blog tours that now swamp book sites – only to find that publishers refuse them free advance review copies of the new books they want."
Check out the Anthony McGowan review referred to in the article. Yes, indeed, he does write YA.