Please. Claiming "people who buy american cars give up on them sooner even though there's nothing wrong" is just ridiculous.

You might as well claim that customers who eat at Burger King are less likely to finish their meal than customers who eat at McDonald's.
And if y'all want to talk about cars and miles...my parents' '94 Blazer and '95 Oldsmobile have less than 100,000 miles on them, and a '90 Grand Prix that was totalled, as well as a '90 Jeep Cherokee that we sold after buying the Blazer, had less than 100,000 miles as well. All have/had suffered several mechanical failures, including alternators crapping out (more than once on the Grand Prix), heaters failing, the 4WD actuators on the Blazer and Jeep crapping out, brake system trouble, fuel system trouble, power-steering trouble, transmission problems, and electrical gremlins.
Most of my relatives own american cars that are 10 years old or younger, and they all have nearly as many problems.
The only great cars my parents have ever owned were a 200,000+ mile '76 Jeep that had no problems other than rusting out, and a 200,000+ mile '84 Accord that was sold after someone broke into it and broke the starting mechanism by trying a screwdriver.
In the year that I've owned my 203,000-mile '85 BMW, so far the top mechanical failures are two broken wires that disabled the alternator (until they were replaced) and old, cracked coolant hoses that leaked and caused the car to overheat.
My friends have all owned foreign cars, including a 170,000-mile '89 Celica that was killed off by a bad CV-joint (damaged the block/oil-pan) and a negligent oil-change place (oil not replaced, engine blew in the weakened area), a 290,000-mile '88 Camry that was given up on after the engine/transmission mounts crumbled upon attempting a clutch replacement, a 260,000-mile '85 Accord that regularly travels 6 hours between here and my friend's University in Minnesota and is still running fine, and a 220,000-mile '85 Supra that is driven hard yet suffers no problems.
The only bad cars my friends have driven were a 103,000-mile '89 Sentra that was abused by the previous owner, yet didn't have any problems other than a slippery clutch which eventually gave out (the car was junked), and a 130,000-mile '89 Jetta that was drained of all of its fluids and sat for 5 years until my friend test-drove it (the car was given gas, but the previous owner forgot about the no-oil and no-trans fluid). It had a leaky radiator, bad wheel bearings, a bad transmission, a bad powersteering unit, electrical issues, and a worn clutch. However, most of those problems have been fixed now, and the VW is used daily.
Like BlazinXtreme said, Detroit has made leaps and bounds recently, but in the mid-90's and earlier, they weren't much to talk about.