To be honest, I think the Luftwaffe could have dumped a couple of atomic bombs on Britain and they could have shrugged it off XD. But you bring up an interesting point. Honestly, it wouldn't have mattered. Here's what i'm thinking....... *floats into dream world*...
Scenario: Somewhere in 1940. The british are being eaten by the Luftwaffe in the skies and on the ground because of the A6M. Now since Japan seemed to really hate America, they would have declared war in 1941, day which will live in infamy, etc. Sooooo, after learning the tactics in the Pacific in, say, 1942? Is that fair? They would have taught it to the Brits and gave them the expertise they needed to do the exact same thing that we did in the Pacific. Lay down the law.

__________________
To the German Commander-- Nuts.

-- The American Commander