Oh, it's not personal confusion I'm worried about. It's when people say they have a mega you don't know which one they are talking about. And when you google for the mega, all you find is the 1280 mega, not the 2560 mega.
I google for Arduino Mega - first result takes you to the old mega. Yes, the mega2560 is listed there as the mega2560 - nothing really to tell you what is what, so you click on the mega link, and it tells you about the old one. Nothing on the old board's page to say it's been superseded by the 2560.