Geauxtigers

I have luckily not run into your situation before but that's sounding more and more like the new American. Some of the phone agents I've spoken with have been downright terrible. When you got to London, you should have spoken with a desk AAgent to sort it out for you there instead of on the phone. They have the transfer desks right after arrivals correct? Not surprised BA treated you well, in the few experiences I've had with them they've been pleasant.

Nope, only those flights that originate from the EU. Since the delay was at JFK, no compensation is required.