I'm in Orange County. Within about 5 miles of my place, there are about 2 dozen Asian restaurants (Chinese, Japanese, Thai, Vietnamese, Filipino, Indian, Mongol

I'm in Orange County. Within about 5 miles of my place, there are about 2 dozen Asian restaurants (Chinese, Japanese, Thai, Vietnamese, Filipino, Indian, Mongolian, etc). I'm excluding the big chain restaurants. There are two "Chinese" buffets, and there used to be a third. They've all had sushi sections. Maybe the businesses in this area have opted for variety rather than authenticity, or maybe one was a pioneer and the others followed behind. My point is that I see a lot of specialization in my area, but I also see combo buffets, and I'm not sure how to account for the difference between my area and yours (aside from a hand-wavy answer of "demographics").