Yes i'm well aware of operation paperclip. The outcome was that it helped notably augment the US's R&D, especially for space programs, but it wasn't a decisive factor in the US becoming a superpower or beating Germany. The US had already introduced german scientists - notably Jewish Refugees - to their weapons programs including project Manhatten, but the crucial factor was that the US had the money and industry to even begin these programs. It was the US's industrial capabilities and it's naval might that made it a superpower. Hell, the USSR was an industrial powerhouse struggling with massive officer shortages post-purge along with a rapidly expanding military and consequently struggling to effectively fight early invasion and yet it still managed to halt and reverse gears against the the Nazi war machine. Nazi Germany even before the war had terrible industrial capabilities, manpower shortages and oil shortages; all of which are indispensable in war. It simply could not afford at any point the casualties and attrition it was facing, no matter how small, and WW2 was very much so a war of attrition.