This is the first even mild questioning of light rail I have seen, and it is certainly welcome. It even acknowledges that the sole advantage of light rail over much more flexible and less expensive buses is that it is more appealing to the middle and upper classes. Via Kevin Drum:
Josh Barro thinks our cities are building too much light rail. It's expensive, often slow, and offers virtually no advantage over simply opening up a bus line. The problem, according to a 2009 report from the Federal Transit Administration, is that "Bus-based public transit in the United States suffers from an image problem."