"Comp has nothing to do with lag, rpm dictates this, a ROLLER BEARING will have virtually ZERO lag, due to it not having so much friction to overcome. "

yea right !! i have driven cars with almost identical spec`s one on 7.2:1 and the other on 8.5:1 and the difference is shocking !!!
roller bearings "help" to reduce lag but don't stop it !!
you need a variable vane turbo for that !!

having a lower CR WILL give it more lag as you reduce the aspirated side of the power band, that's old school knowledge !!!

as i said in my first post, lower comp USED to be used to reduce the chance of detonation

old school trick that's well out of date now days !!!!