Hey Yang, Chris-
I don't want to get in the middle of your "discussion"
but for what it is worth, in the testing we have done here the guys seem to agree that single cell 13.5 is faster that 4 cell 17.5.
It's a moot point, the two are not compatible and shouldn't be run together, IMO. Whether we choose it, or it is just being forced on us, single cell will be the class going forward
