Look at the way Boston made a huge move, too - they went with Jeff Green over Kendrick Perkins.
That's a move most of us think is crazy, but the stat gurus are saying makes sense. And it makes sense for style of play in the East, too, these days.
The only teams in the whole league that can really hurt you with size are Orlando and the Lakers. Obviously, you need to be able to get by those guys... but there aren't many teams that use size.
A guy like Jeffries can defend almost any forward or wing in the league. Tonight in Miami, Chicago put Noah on Lebron on the last play and Bron missed. The East now is about more versatile bigs who can defend the perimeter and in transition... rebounding is a plus, of course and Jeffries is only average there. But he helps everywhere else.