My gut feeling is that the VG278H and the VG278HE are different models. Regardless of what some one at Asus has told you. While yes there may be a 1 in 100 chance it might work are you willing to risk that on 2 $600 monitors?
The reason you can't get a straight answer is because no one has taken the risk. I know I didn't, I was in the exact same situation as you.
Here is the VG278HE EDID inf and it's listed as VG278HE not VG278H
PRODUCTID="ASUS VG278HE (ACI27E3 EDID Override)"
Here is the VG278H EDID inf and it's listed as VG278
PRODUCTID="ASUS VG278 (ACI27F8 EDID Override)"
Anyway good luck Edited by emett - 11/14/12 at 9:42pm