I am surprised that nobody so far has asked the big question about the 70D..... Does the mode dial go all the way around?
It definitely looks like it locks!!!1!!1!one!1!
Don't laugh! That was one of the best things about moving from t2i -> 60D. It was pretty easy to inadvertently move the t2i dial when taking it in/out of a camera bag.
I hadn't thought about the possibility they WOULDN'T have that, but I agree, the photo looks like it has the center release button on the mode dial.