The problem to speculation, of course, is you can never test FOR a strategy or AGAINST a strategy. The Strategy has to be organic, if your opponent KNOWS what you are going to do and you are locked in, he can ignore other avenues and claim (when you deviate to win) that you cheated.
That’s a trap I fell in a few times. Of course, it’s my opinion that if you have to alter yourself in such a way to stop a strategy from succeeding that you allow your opponent to alter her strategy and exploit you in a more conventional manner, then the strategy worked because she still won. :P
For instance, had a situation back in Alpha 2 where America could bloody well forget Europe altogether and run rough-shod over the Japanese like a Panzer II blowing through a wheatfield as its only resistance. Sure the Panzer got stuck in the mud sometimes, but it generally won against the amber waves of grain! England and Russia could just hold out long enough for the Americans to erase Japan as a threat (notice, I never said Japan itself was taken) and then America, with more income than Germany and Italy combined and more power than can possibly be imagined could get to Euro/Africa fast enough to prevent a VC win by the Germans. After that, it was a matter of time.
So I started seeing people test that theory and they’d do crazy shizzit like fly the entire Japanese airforce to suicide against Russia and push infantry to islands in the pacific to defend against American transports. Neither event happens in a routine game, nor would any player do this if they thought America might start dumping more forces in the Atlantic to compensate for drastically reduced resistance in the Pacific. For instance, one guy thought it was legitamite to suicide the entire Japanese airforce on Egpyt to bust it open so the Italians could drive through - okay, sure, but the ENTIRE Japanese air force? And while America has 3x the war material in the Pacific than Japan because Japan focused on airforce only purchases to fly to Europe? Not a standard strategy. It worked though, and I thought it was cheap as heck, but the Russians fell the same round I decided to just take Japan (because Japan had 6 infantry, 1 artillery, 1 armor on it for defense after literally spending 100% of their income making planes and flying them asap to Europe)
So basically, its impossible to test for a specific strategy, rather, you have to go research games in which a strategy was employed and then discuss the merits on that basis.