I (not circumsized) don't think the lube/non-lube thing is relevant that much. It works but lube is definitely still a good idea.

What I do think makes a difference is the missing sensitive skin though. The inside of the foreskin is very sensitive, much like the glans. And when you pull it back, that skin is on the outside of quite a bit of your shaft.

I have trouble comprehending the size of the IceCube detector in Antarctica, which is one cubic kilometer big.