Wait, where? I don't remember that

. I meant more that YY seemed more kinda, I dunno, normal or something. L☆S had a lot more otaku fodder (not that YY didn't) from what I remember, too. Like Konata and the whole "Flat chests are a status symbol!" thing, for one example I can actually remember.
EDIT: You edited your post with a clip. I'm assuming that's from season two, which I haven't seen yet.
I'm not saying YY
wasn't wacky, but it felt like a different, lower-level kind of wacky to me.
(I've only seen the first season of YY, though. I need to watch the second one some time.)
Keep in mind that I watched L☆S a few years ago, so I don't remember it that well. I could be wrong. All I know is that I hate the show

.
Although, both shows do have something in common: pretty fucking great opening songs.