Don't sweat it 'Diesel8'. I too am a US trained pilot and CFI currently in the UK getting my ATPL.
I have come to the conclusion, as have many of my colleagues, that Brit pilots slagging US pilots is a direct result of:
1. A general lack of flying skills. Although they seem to be quite proficient in such cr*p as morse and how far below a balloon it's anticol light shall be hung.
2. Too much Guinness (not necessarily a bad thing)
Safe 2000 all.