Bedrockgames
I post in the voice of Christopher Walken
It's not a real word, as far as I know. So I guess it means whatever someone wants it to mean.
To me, it clearly means something different to what it means to you. I don't think Mr. Edwards coined the term, because I'm pretty sure I remember hearing and using it long before I discovered teh intrawebs. And the above description isn't how we used the word.
What is more, it doesn't really matter if he coined it or not. Whatever definition has the most utility for gamers will be the one that wins out. Gamist=gamey seems to be overtaking the Edward's def and I think it is because it is broader (gamey includes edward's ideas but extends to other things as well) and just more functinal. Edward's def is narrow and rather unclear to lots of people.