First of all one of the things we found (Bill Wasserberger and I) while at Brunswick was that for the majority of cases, the pin in the palm left a majority of the core intact after drilling allowing a bulk of the dynamics and adding a weight hole 6.75" from the pin increased the overall dynamics plus asymmetry...so for the mass majority of cases, pin in the palm has minimal effect on the core...so a 5" pin to pap in the palm with create more flare potential than a 5" pin above...does that make sense?
Now in the majority of cases for the average bowler, bowling on typical conditions with built in friction how much difference will be noticeable? In my opinion, minimal...maybe 1/16"+ or - in flare...