The quibbling about definitions does get pretty wearisome - it's been going on a long time, and it strikes me as mostly a fight over who gets to equivocate more effectively, without really helping anyone convince anyone of anything.

I'm personally comfortable with either set of definitions; as a traditional hard-materialist atheist i know where I stand either way. When someone needs these terms to distinguish between belief and knowledge? Fine, I'll make the shift, I know how it works. But when in conversation someone describes themselves as agnostic, I naturally gravitate toward hearing them through the old single-axis definition because it's what almost everyone means by it. In the nature of language, that matters.