If it makes you feel better, I’ve been unlucky since the March 28 patch. Before the patch it was like Oprah was there giving away loot (YOU get loot, YOU get loot, EVERYBODY gets loot), but now … pft.
Little anecdotal evidence (so this means “nothing” really). I’ve hunted 2 sets of eastern leather armor (all 2 slots) 2 harvesters (both 4 slots) a couple of small crystallas (2 slots) a bajillion war mage gear in the past week. Now, nothin (granted it’s been 3 days only).