I don't think grip has any more direct effect on cue ball action than bridge length does. But it can easily have the same kind of indirect effect: screwing up tip/CB placement accuracy.
I don't think the "lifting" effect you describe is real unless you misshit the CB.
pj
chgo
I agree 100%.
It's another one of those things that may possibly influence an outcome due to other factors but not neccesarily are the direct cause of it.
In this example, there's no reason why a person could not create dramatic amount of draw with a tight grip although a tight grip MAY inhibit that ability if it happens to affect the intended delivery of the cue. It may or it may not but is not the defining factor.