It may not help suspension wise, but I think it helps to stiffen up the front end.
At one of the HERD meetings, I was talking to one of the guys who had it on his SS, and he told me that it stiffened up the front a little bit.
He also said when you go over bumps with the SS with out EBB, the head lights vibrate and vobale a little, (I totaly agree, especially on the highway) with it, it's more stiff like a unibody. Or maybe there is a way to tighten up the head lamps so they don't get jiggy with it on bumps.
I wish I could test this EBB thing first hand.