IGPX is old, and kinda cheap looking. They really didn't have the budget to pull off some of the CG back in the day, let alone have it stand up to modern criticism. And it's a pretty unknown property. I think a lot of people see that as a good point to just peace out and flip channels...I know that's what I do.
I know people have been saying that the dropoff is consistent with past ratings, but I have a hard time believing that isn't a programming related problem. Like what was in the IGPX timeslot before? Wasn't it Tenchi or something especially crappy? Thundercats? Shedding 255,000 just seems really sudden. Like why not have it happen at 3am and not 2:30? Like that isn't consistent at all with the rest of the drops that happen throughout the night, I honestly think people just don't really care for IGPX.
Naruto over Bleach? Might be the filler stuff. Naruto is going to be in nothing but canon material for awhile, I bet once the filler arc starts things will look normal again. Just the side stuff with no continuity between episodes is hard to swallow, unpopular characters being the star of an episode, just a bad mixture.
As for Baccano!, I heard good things. First episode was confusing, I don't think I gave it another shot. I got like two weeks off before my new job starts, I'll probably try to marathon a few shows. It's at the top of the list if the hype is warranted.