It's not made up, it's a common acronym.
Just not commonly used for the phrase "error correction code" http://www.google.com/search?q=ecc
Though you could argue that they should have really put "ECC (Error Correcting Code)" instead of the other way round.
That would have made more sense.
That said, you'd think WoW players would be a bit more concerned about, oh, I don't know, the constant server crashes, rolling restarts, major patch bugs[...], and just generally utter crap technical quality of the game [...] even though no other modern MMO suffers anything close to that level of technical dysfunction.
You're joking right?
"its more open when developers have choices."
Not necessarily so for the user.
That doesn't even make sense.
Hackers of the world, unite!