Nah. It's just general hostility. The Wii U ain't perfect. Far from it. Treating it and ME3 there like it's the scum of the Earth is just well... whatever floats your boat, I suppose. Keep on hatin folks.
There are two separate aspects to it. First is that it's an Internet meme to trash talk anyone who has a WiiU as a moron who has no clue. This is regardless of any reason, such as buying it for Zelda, back catalogue, the ability for 5 friends to play co-op, or because one has kids.
The second is that people here hate everyone and everything: People who ask questions. People who play nearly any character available in the game. People who play for fun. People who don't play as well as them. People who play better than them. People who use powerful weapons. People who use weapons that are not considered to be powerful.
The point being, there's so much hate available and the triggers for that hate are so plentiful that anyone should expect to face it at any time. Yes, it blights the experience of reading and posting here. The compensating factor is that there are quite a few funny, generous, and knowledgeable people around here too.
That said, now I'm off to play the Reegar AIU with Grenade Capacity V on the WiiU 