Oh yeah, the toyota matrix? LOL!Do some research.
For instance, a bunch of GM cars get better mileage than 30 mpg. Like the Pontiac Vibe and Toyota version which is made in California. Or the Chevy mini vans. Not exactly my style, but they get really good mileage and are cheap in comparison to say a Odyssey.
Quality is also improving on the US built cars. Go check your research and come back and tell me who is number one this year for long term reliability. On new car reviews, the Ford Fusion beat out the Camary and Accord according to Consumer's Report.
Sure, quality is improving, as it is for japanese car makers. It's not about that, it's about the fact that they are still behind. Who cares about new car reviews? It sounds good, but it's fairly worthless. Own it for 2-4 years and then review. Of course that's not going to necessarily help you a lot with a new purchase, but the new car review is equally worthless. My best friend has the mercury milan AWD V6(AKA the ford fusion) and it's pretty sorry for milege. My subie with far more HP gets far better milege (like 8-10mpg better). It is a nice car, but with a 6 speed auto trans you'd expect better milege. Of course the reason my subie does way better is that it uses a much smaller engine, and when all that extra HP is not necessary, the turbo doesn't turn and it is quite a bit more efficient.
Not only that, but look at all the semi-efficient japanese V6s in the 3-3.5L range, they're packing 250-280hp and the US automakers can't seem to match that. They either use a supercharger (3800 series), or a V8 and sometimes "turn off" cylinders, but in the end they're just bandaids. The japanese are far more serious about producing vehicles, and the americans are far more serious about not pissing off the UAL, their suppliers, and so forth. One of my professors was head of ergo/HF for GM, and retired. It's not that they can't physically build the cars like the japense, it's that they've erected mass amounts of red tape and self imposed limitations over the years. Just as an example, they can't change contracts and use a more ergonomic wiper/light control lever because they've always used the same supplier and the union would keep them from changing to something better. It's all sorts of things like this that are rooted deep in the companies that simply screw them over time and time again.