odawg, I've been on your side here...
My question is this - you show a chart of motors and rpm -- what voltage are those rpm achieved at, are they dyno'd at 'no load', or under load? Either of those questions makes a huge difference in final rpm, not to mention the state of tune of the actual motor in your specific car.
I'm not trying to argue, but seriously - that chart is nothing more than a relative comparison between their various motors - not a true spec sheet on any specific one.