Ringo didn't teach Zak. He's stated on several occassions that he showed him a basic groove and that was that. Zak grew into the drummer he is sans the ringo walls. It was evidently healthy. You are quite right. Zak plays nothing like his dad. He's an individual and was allowed to grow as one.
Zak actually plays more like his "uncle" Keith......yes that Keith.....Moon the Loon........than his father. And yes you are correct...he has stated many times over that Ringo showed him a basic groove once, to which his reply was "well I can do that already dad"....in which Ringo replied: "well you're on your own then son."
I think the point that was being made was that Ringo showed Zak a basic groove, not a Ringo groove, but just the basics. Jason is attempting to show his son how to play Zeppelin grooves, not basic grooves.....there is a difference. One can't expect a beginner to pick up the sticks and instantly be able to play the Immigrant Song, or Achilles Last Stand (no matter if it is supposed to be in the genes)......which it SOUNDS like Jason is attempting to do. The way to do it is to show him the BASICS, then let him take it where he wants to from there. Thats all I'm sayin'......
BTW, I have my fire extinguisher ready for the flaming I know I'm about to get.....LoLoLoLo