Mostly just Leaderz0rz with the unjustified hating, but I've seen plenty of people dismissing it, both in real life and in other communities, just because it doesn't look like the "standard" controller.
I bet you guys don't remember when the NES came out with its gamepad, and people thought that it was stupid and the joystick with the bulky buttons was the way things would always be.
Yeah, well they sure were right, weren't they!