There aren't that many true crankers anymore, alot of guys you might think are "crankers" aren't really crankers, they are tweeners.  A true cranker doesn't really have a slide, more of a stop, plant and pivot.  I would say where I am from there are a couple crankers that avg 200+, and a couple strokers that avg over 200.  Most of the 200+ bowlers around here are tweeners, which stands to reason since most bowlers today truely are tweeners or "power strokers".  Just because a guy has a high rev rate doesn't make him a cranker, Parker Bohn once was qouted as saying his rev rate was as high as 427, would you call him a cranker?