It seems like everyone is confusing elitism in its practical use to the arrogance that comes with it.
No, its how much you like something.
No, it is not how much you personally put effort into the game.
No, it is not a buzzword, though it is often used as one.
It is relative to how much the minimal effort is to be an average player of the fanbase.
Animal Crossing may need 15 minutes a day and for optimal profit, 30 minutes. All of which can be done with multitasking.
While an optimal day in mmos can take 5 hours.
While fighting games are easily played without knowing about them, especially titles like Persona 4 Arena and Super Smash Brothers, you will be always destroyed by any player who has a few dozen matches under their belt.
Tetris and Puyo Puyo can get up to Chess levels of per-determined moves, but most players will just play time to time and nothing in the game in the normal mode can't be eventually bulled through.
Dark Souls is a hardcore title as it doesn't at all give instant gratification, and needs research and/or memory retention to succeed in. However, this does not make the fanbase hardcore in general, as I'm absolutely sure a large percentage does not play a variety of difficult games, never mind From Software's other difficult titles like Tenchu and Armored Core.
Same goes for competitive games, as while it requires hardcore effort to get good at most titles, long-term dedication is NOT remotely anything 80% of the sales the games get.
While it is a good rule of thumb when if you only play AAA titles, a small amount of genres, and/or maybe some odd indie/niche titles from word of mouth, you're just an average player.
Just because people get frustrated by the misuse of something, doesn't mean they don't have a purpose in society.
That talk banned alcohol.