I've seen all of the currently aired episodes for Kids on the Slope.
It's a good anime, but you guys might be over hyping this. Sure, it's going to get a lot of attention from its allstar production cast.
But, so far it's just a typical slice of life series, with your expected love triangles/squares/pentagons, along with a Jazz motif/theme.
It might get better as we progress, but as of right now, it's not my favorite of the season.
I would have to say Hyouka is my favorite anime this season, brought you to by the legendary Kyoto Animations, infamous for Haruhi, Lucky Star, K-ON, and Clannad. The budget they have for animation is ridiculous, you can see so many little details they put in, that 95% of the other animation studios wouldn't even bother with.
The story may be a little bit slow, but the atmosphere and mood the series sets is unrivaled for shows this season.
Shout-out to Kuroko no Basket, which is a basketball anime series, that I did not expect to be this good. It's a typical shonen series, but its just done very well, and can rival Slam Dunk as a potential new throne for the basketball manga/anime series.
Also, Space Brother is another good series that's worth looking into. The first three episodes were very engrossing, but recently it's gotten really slow, probably due to the fact that the anime is supposed to be 50+ episodes long.