It would have been a great article if they had mentioned 2 or 3 concrete things they have learned. Lets wait for an update...
What would have been better, from my perspective, would have been after reading the post saying "hey, these guys have a much better product that what Google has launched, it is much more mature and much more thought out. I think I'll give them a try and tell my friends to do the same". Turn a negative into a positive, that's all he can do at this point.