well... I have a player who have tremendous driving but pitiful IS and he always misses layups....
and I have a player with respectable Driving but mediorce IS... but when He get layups, its automatic.
so my hypothesis is:
driving increases the chance for inside shots (layups, dunks etc. for guard)
IS determine how well they finish those chances...
btw have anyone seen a guard dunk for finish after slashing to the paint? I have a theory that it has something to do with inside shots.
IS = ability to finish at the rim, (as the player become more adept, he learns to dunk?)