iPod Touch screen problems - defect or design?

The Blue Meanie writes: As reported by a friend of mine, and confirmed with a thread or two elsewhere, people are noticing that a number of the new iPod Touch screens are producing really BAD video, especially in darker areas. Is this just a case of Apple picking a lousy screen for this model, or is this a manufacturing defect? They obviously didn't use the screen from the iPhone — are Touch users destined to suffer with sub-par video?