"you get better looking collisions and it doesn't cost you much, if anything."

Yeah I dunno about this. Generating good convex polyhedra isn't free. Their cache missing extra memory isn't free. Nor is the test free.

I suppose it all really depends on the use case. The right balance of early out vs precision depends on your data set. Run too many early outs and it can be a net loss. Run too many precise tests and it's a net loss.