If 75% of the population who love and rely on flying mounts quit WoW, how long do you think the game could be sustained with the loss of that much revenue?
YES!!! I love random percentage guesses that have absolutely no basis in fact.
And I highly doubt that people who had put years into a game would quit because their travel times started taking a little bit longer than they're used to all of a sudden.
I think you missed the word "IF" in the person's statement.
I'd quit in a heartbeat if flying was removed.