If WordPress had always magically corrected wordpress into WordPress, would we be having this sort of argument, or would it be something we always accepted?

Mind you, I think it's a really stupid change. I get why they did it, I don't mind that it was done, but I mind the hassles it causes when you legitimately want to say wordPress or Wordpress or what not. Yes, I can turn it off via a filter, but much like Hello Dolly, and adding links to plugins to your front end, this should be opt in.

Make a damn checkbox in the Writing section and say 'Have WordPress autocorrect the spelling of WordPress?' with a default of 'no.'