writes "New York Times gadget reviewer David Pogue got into an email back-and-forth with Valleywag after he was tricked into writing an article by advance misinformation on a pre-launch product. In theory, it's good for reviewers to test and write up products before release day, so consumers can make informed choices. In practice, Pogue and we wish the industry standard would change."
Personally I think this is why blogs are great- if a product sells 100,000 units, it only takes a few dozen bloggers to encounter problems for the truth to come out. Of course, that doesn't help you if you want to pre-order.