Since the 1.03 patch, it often feels as the purple monsters (unique monsters, often related to quests (e.g. the monster which spawns when you retrieve Zoltun Kulle's head)) drop really crappy loot. Oftentimes, they only drop a couple of gold piles. Do purple monsters have a better chance of dropping magic, rare and legendary items than white monsters?
To clarify what I am looking for:
Is the chance to get magic (or rare/legendary) items any greater from unique purple-named minibosses than from normal white monsters?