[Supafly345]

They use a variety of programs. Including Adobe Premiere, and Final Cut. Flash is painfully obvious when you see it on televison. Those new Jetson cartoons, for instance, that were made by SPUMCO were partially done in flash. And you can really tell.

Flash is designed after video editing software so it is understandible how they can be confused. I took a few broadcasting classes that used them and some of the aspects are similar.
There are cartoons on television made entirely out of flash, but they all look like crap. ATHF is not this level of crappyness. Flash may be used for some(not all) of the original quicktimes. But definitly not for the final editing. Depending on the effect they want they use different programs as necessary. Flash would only be used for extremely simple movements.