We don't have any chain Asian locally, but quite a number of Thai, Korean, Philippine, Vietnamese and Chinese restaurants. The Chinese places are all over the map and hard to talk about collectively. I suppose that's good as it allows you to find the one that matches your taste. I would agree that in general, their food is far sweeter than "American" dishes. Even our Thai restaurants, although owned and operated by folks from Thailand, tend to be sweet. It's surprising, since my theory is that they cater to the 2 local military bases where I would expect patrons to know what the real thing tastes like. Interesting observation on the part of the OP. I hadn't considered it until now. I may just have to try a few new places to see what I can find.

BTW, not all European countries leave out the sugar. I challenge anyone to eat a weeks worth of dessert in Vienna without the urge to make a dentist appointment upon returning home.