I've been to both IMAX theatres. We go to a "Real" Imax in NYC at Lex and 68th street and a "fake" Imax in New Brunswick, NJ. Actually, I prefer the smaller "fake" Imax since the big screen is too big to take in all at once, even from the back row. The "fake" Imas has the Goldilocks thing going for it as it's just the right size and has excellent sound to boot.
And, yes, Skyfall was superb on that "fake" Imax. ...and at home on BD, too. I love the China bright light/big city scenes and when the mansion blows up.