I would agree that there is no set formula for creating revs. A loose wrist however is paramount, and it is easier creating revs in a forward roll manner, overall.
I bowled against a two-hander last night in league. Young guy who easily topped 500 revs, throwing around 19-20mph. When he did hit the pocket......he obliterated it! But he continually tried to overpower the lanes, thus sacrificing accuracy!
Not to mention, that while throwing his Hyper-Cell Fuse, he chopped up the lanes on a light-oil condition!
This made it dicey for the rest of us trying to avoid his track. Results were, right lane playing normally with a natural transition, even though on the fresh shot this lane originally hooked like crazy. The left lane started out easy to play, but morphed into an over-under hell because of THAT REVS GUY!
Results: He ended up with two 2 hundred games the first two, and a 155 the last one because he could not carry, even with all those revs!!! 593 set!
My teammates and I just watched where he played....played around him.......moved deeper, and matched our revs to our speed, and ultimately we all scored well. All three of us had 625+ sets!