But I thought the Tekken series is more mainstream even among "mainstream" (at least in terms of sales and recognition). So perhaps what he thinks of the DOA series as mainstream is a bit off. I sometimes even thinks that that was one of the reason he doesn't like it to be in the arcade market anymore. Many times, the Tekken board gets line while many left the DOA open.
One of the reason he likes to bash the Tekken series is because his pride won't allow him to swallow the fact that it (Tekken) beats his own hard work. Though Virtua Fighter is possibly the best among hardcore fighting fans, it's just not there in terms of sales to be a threat to DOA (plus he said something about it as one of his inspiration, or something).
But yes, I do agree with him regarding Tekken outside the fighting genre (Devil Within, Nina, etc). Especially when compared to DOA spin-off.
BTW, this is coming from a big fan of the genre (3D). Though I stopped playing Virtua Fighter 4 long ago simply because there's no competition around. I don't know, but I really get bored with AI (as with sports title). So hopefully, VF5 goes online (hoping the same for Tekken and SC).
.Z