Nah, Ibakas length will help a lot. Look at how many lobs KG gets from Rondo for easy baskets, that is due to the Heats length. Haslem is short (he's not even a legit center) and Anthony is old. Ibaka and Perkins are still young and even if Perkins can't match KGs speed, he can body him (which he learned from KG himself). I mean really, who will the Celtics have to back-up KG against OKC lenght? Stiemsma? Bass? The Thunder is simply a more complete team in comparison to the Heat, a lot younger too especially if you compare them to the Celtics. Also keep in mind that OKC will have the homecourt over both Miami and Boston too and you see how crazy the OKC crowd is? Might as well be the sixth man on the court. And they are undefeated at home in the post season!