Regarding Mass Effect, that game is choppy on all systems. I have the first two on Xbox and textures load after models and sometimes don't load at all, and the animations in general are very stiff and non-fluid. Wouldn't surprise me if this is one of those things that happens on all systems but everyone lets it slide on every system but Nintendo's.
Regarding Wii U, I honestly don't know if I'm getting one. My sister bought it for the family as a christmas present, we pre-ordered from Toys R Us on day one, got a confirmation email on the 17th, then got a cancelation email on the 18th. Apparently this happened to hundreds of people who pre-ordered, and whenever they call TRU they are told it hasn't been cancelled, only delayed, most likely. As in, no straight answer, the company literally says "maybe" on the issue.
My blog, mostly about writing: http://www.davidjlovato.com