1script - 4:53 pm on Aug 27, 2012 (gmt 0)
I'd vote for "doesn't matter", too. With one caveat tho: if it looks really awful, it'll probably get you through a manual action by a human reviewer. I don't believe it ever was an issue algorithmically, only if your site would bubble up for a human review, because the reviewers are extremely ads-avert. Even they, I sense, have been trained to give sites a bit more leeway with ads lately.