the biggest thing would be potential flex on high rpms launches. a shank is going to go further into the wheel, and cover more of the stud, which will in turn distribute the load more evenly.
and we'll beat any prices on the equivalent finishes as well!
While I have no reason to doubt this one bit... I have done a lot of nitrous launches in my old fox body on a set of 10holes with some 26" slicks and never had any issues. But then again I guess there was always a chance and I just got lucky... idk.