People who never played WoW or hate WoW are more stuck on that game than anyone else. Terms like DPS, Toon, and Pally have been used in several games BEFORE WoW, including Everquest and Ultima Online. But all these people want to see is World of Warcraft.
I don't think most people mean that wow coined those words, more that most people learned it from there.

As for me DPS, toon, lf Heal and a few others really don't make sense.

I use DD, and I have seen it in other games besides FFXI. So why do people say it came from, or only used in, FFXI?