Well, I don't really want to jump on the guy, but I just can't see temps being that low under conditions that are anything remotely considered normal... granny driver would be the right way to put it, and geared for maybe 30mph tops, maybe something like 25.
This is actually interesting me, I am going to test my Revo out, and see 'what is takes' to keep the motor temps to 100F on a typical summer day.
jsr, can you please posts your truck, compete setup, gearing, batts, etc? thanks, we should all know this, it's very important me thinks in hindsight.