The word isn't one that would be used a lot, honestly--it's more of a theological term than it is one that individuals would probably use to describe themselves. Whereas Calvinists describe themselves with that word (or by calling themselves Reformed, either one), I'd venture to say that most Arminians don't even know that that's what they are? I just use the word because it's a nice, neat label.

And actually, now that I think about it, Lutherans are somewhere in between? I think they're more complicated, so I should have rephrased the bit about being Protestant above. Oh, well! Too late now!