User blog comment:Peelingbanana/Frustrating Fiddlesticks & Confusing Crowstorm/@comment-4952847-20130513013532/@comment-5514182-20130513030156

Agreed. For example: Malzahar's ult can be cancelled just by moving but not Warwick's. Also, Caitlyn's ult goes on full cooldown if casted while using her Net, but not if CC'd by an enemy.