To answer the question; probably. U.K. foreign policy in the region is seen as being linked with that of the U.S. since the Gulf war. Thus, that comment probably resulted in them rejecting the ambassador who once held that post.
Although I agree that the 'special relationship' hasn't done much at all for the U.S., it did a lot for British(English) prestige on the world stage, as it's authority waned drastically since the fall of the Empire.
Because of this, it is natural that Britain would want to ingratiate itself to the U.S. As for what that gets Britain now; well, not a whole lot...
It is unfortunate, but because the Britain is seen as largely irrelevant, there isn't a need to know a lot about it by US politicians. But I daresay, we are not as ignorant as you may have others believe. Indeed, in terms of history, up to 1945, the U.S. knows more about Britain than any other country! That might not be saying a whole lot, but it's a start.
My advice; the UK should get away from the US, and lessen impact for the Franco-German alliance to rule Europe known as the EU. But it should also remember, that the US has been it's ally for a long time. Why would it want to lose that position with the world's lone hegemon? Peace.