MOst people at the time weren't aware of just how far ahead of the Allies the Germans really were. The Japanese also had German jets secretly delivered to them during the closing days of the war, but they never had the chance to use them.
No. Most people aren't aware of how far the *Allies* were and are ahead of the Germans.
The Germans lost, so *everything* that they had became ours. Their secrets couldn't remain secret, so we know all of their advanced work. The same doesn't hold true for the Allies.
What we *do* know is that the Allies were ahead technologically in all of the areas that counted such as electronic computers (the Germans used *mechanical* relays and wheels for their calculating machines), digital logic (the Germans didn't even have it, it was invented entirely by the Allies...one man really - Turing), encryption (the U.S. proved mathematically way back in 1917 what made a code breakable or unbreakable...something that the Germans and Japanese found out the hard way by 1945), mass production, supply chain management, and atomic weapons.
That much of the Allies' secrets of success has been made public.
The German V-2 was made from stealing the patents of the American rocket scientist Dr. Robert Goddard, who examined one after the War and found *exact* copies of his gyroscopic control, fuel injection, and other rocketry breakthroughs.
The German V-3 super-cannon was a copy of an 1865 American civil war cannon, scaled up several times and using electronics instead chemical firing delays.
German submarines were no match for American radar, sonar, and depth charges, either.
To put this further into perspective, the U.S. landed a mere 6 divisions in France on D-Day...against 44 Wehrmacht divisions guarding Normandy. Guess who won the day?!
By 1945, the U.S. produced 50% of everything made on this planet, too.
That's the reality. Everything else is the myth.