Actually, I read it in the patch notes, so I noticed it. And someone else mentioned it at least twice in the Patch Notes thread, and others in another thread. So other people did see it. :P

And no, it's not a big deal since the servers are more stable. It'll just make your PC run hot for a longer time and lessen the lifetime of your PS3 if you stay logged in constantly. So it's that person's loss if they want to AFK for hours.