I've heard from Len and others that for accuracy, there is no beating longer ATA's, and I would figure heavier bows would be heavier for accuracy too. But they keep coming out with light, short ATA bows. What's the deal with that?
Maybe this may sound lazy but from a "convenience" in portability standpoint the short bows are tough to beat. Granted, we are only talking about 5 or 6 inches of length here but, mentally, that seems to make a huge difference to me.