If I had to rank the nations of WWII in order of their technological prowess, I would place them in the following order: the US, Germany, UK, USSR, Japan.
However, I wish to thank Lazarus for for pointing out the obvious discrepancy of the Germans utilizing both the most advanced form of transportation (V-2 and ME262) and the least advanced form (horses and feet) of all participants. Whereas the Allies, particularly the US, had a great deal of transporation, even to basic infantry, provided by gasoline powered vehicles such as the Jeep which gave the US and UK a very clear advantage of mobility:
http://en.wikipedia.org/wiki/Jeep
Jeeps were used by every division of the U.S. military and an average of 145 were supplied to every infantry regiment. Jeeps were used for many other purposes including cable laying, saw milling, as firefighting pumpers, field ambulances, tractors and, with suitable wheels, would even run on railway tracks.
This show the level of technology for the participating countries in WWII varied considerably both between nations and within individual nations.
One perfect example was the Jerrycan:
http://en.wikipedia.org/wiki/Jerrycan
A simple, but effective technology that was eventually reverse engineered by the Allies. This alone might have enabled Rommel to do as well as he did in N. Africa as one of his big problems was a severe shortage of fuel. With the massive industrial production capabilities of the US and the clear need for this by the British colonies prior to the war, why didn’t either side develop an equivalent prior to the war as had the Germans? Its not as if this were a difficult thing to do.
I can point to dozens of similar accounts on both sides illustrating the spotty development of technology during the war. Why was the concept of drop tanks (greatly extending flight distance of fighters) developed so late in the war? Why did the Japanese, despite having perhaps the best submarines of the war, neglect to develop anti-submarine technology? Why were the Russian tanks, despite the low technology of the soviets (such as the poor quality of steel and poor erognomics and lack of radios) in many ways superior to the German tanks, such that the Germans copied the best features (such as sloped armor)? Why were the British, after having cracked the German enigma code, so lax in their own communications (they could have simply developed a similar code)?
Technological development for all sides was uneven and always in development such that the best technology was often obsolete before it could be mass produced . Not that mass production was always possible or even desirable. As an example of undesirable production, the German shortage of fuel precluded the use of “Jeeps” for infantry even had they decided to build these.
Note to Zukov; While I can appreciate wanting to use the best sources, I prefer to use wikipedia links (and other well known media sources) because these are fairly accurate and usually virus and spyware free. Some of the other links, while potentially better sources of information, are also not as secure and often of a more questionable quality than Wikipedia. If the link address looks odd, I generally won’t click on it…