This is the truth, right here. Richard Garriott made enough money in the course of his pre-Final Fantasy VII career that he could afford to build himself a castle in Texas and also go into outer space. Final Fantasy VII is the game that arguably introduced American gamers to the JRPG, and made that genre worth something for the course of a console generation or two, but that's as far as it goes.
And where did Richard Garriott (and the SSI Goldbox guys, and the Wizardry guys, and so on) find their inspiration? Dungeons & Dragons, which by the time of the NES was already a household name in the United States.
So what? TEN MILLION COPIES OF SKYRIM. Three million Deus Ex: Human Revolution. Five million of the Dragon Age games, for better or for worse. It doesn't get any more mainstream than that. To argue that my little brother, who put two hundred hours into Morrowind and Skyrim, and is starting New Vegas too, isn't an "RPG fan" because he didn't also buy Growlanser: Generations is ridiculous. That smacks of elitism. "You're not as big a fan of RPG's as me: I bought Phantom Brave and all the Falcom PSP games. All YOU bought was Dragon Age and Pokemon, you poseur".
Does anyone else remember being told at a very young age that Dungeons & Dragons was the "work of the devil?" I sure do. Consequently, as soon as we were able, we bought the books and played the game.
This, I think, is a generational thing more than anything. The folks who discovered role playing games through Final Fantasy VII will certainly remember that as the catalyst of the RPG revolution here in the U.S.; it's worth noting that this is pretty much a strictly console based phenomenon however(excepting Anachronox and the shady VII port). Meanwhile, those of us who didn't like VII and had been playing Dungeons & Dragons, and eventually Ultima Underworld and the Wizardry games didn't need to be introduced to the genre at all.