So you believe that Google should SELL (for a profit) their cached copy of the internet - surely no one out there is going say that is "fair use" with respect to copyright.
You are right.
I guess I was groping for a way to politely tell him "no way, we know what you are up to, and this is a moronic request." (Of course I have no way of knowing if that is what folks at Google think of his request - it's just what I think of it.)
Your point of "fair use" restrictions would seem to be enough. If Google were to hand over the data (even for free), they would very likely be sued by multiple publishers over copyright issues.