Oh, and Crumpp:
"I think your talking about the British that the Germans rated the lowest"
They certainly did not rate the RAF as the lowest. Remember that the RAF dropped more bombs on Germany than the USAF. Many German Aces will tell you that their most dreaded foe was the RAF.
Hmm, what then? the Royal Navy? Hardly, for by the time the US Navy entered the fight against the Germans, the RN had already crippled and locked the German Surface fleet in, and were scoring nicely against German subs. At the time, the RN was also a bigger force than the US navy.
That leads us to the Grunts. The first fights between the US and the Germans were in N Africa, where the British had the Germans completely on the run. Hardly that location then? What about Normandy? Well, the British seemed to be doing just fine in and after the invasion, - no worse than the US.
May it perhaps be that after their initial success in the Blitzkrieg and the conquest of France, that the Germans took the opinion that the British were a weak force? Maybe, but it was their mistake to belive that it would stay that way.