while i agree with what you are saying, i hardly think a couple of months is "right away". i definitely want them to get it right as well, but they have had months, and not so much as put out press responses or updates on what they are doing. then there is the whole, they shouldn't have released the devices until they had it right. this is NOT a surprise for them. they knew about this well before they released them. but they cared more about getting them out before christmas, to push sales, than they cared about their customers and giving them a great product.
I'm glad they released it last year, even with all the problems.
Microsoft stated in early December “Yes, The ‘standby’ battery life is an issue we are working on and have been working on. We can put the processor into a deeper sleep state than it is currently set to. We couldn’t do it at RTM for a variety of reasons, power management is a very hard computer science problem to solve especially with new silicon. Currently it is not in the deepest “sleep” that it can be so there are wake events that would not otherwise wake it. We will have an update for this issue sometime soon in the new year.”
I take Microsoft at their word that it's "very hard computer science problem." Perhaps their biggest mistake is not elaborating publicly in more detail on what the problem is and the steps and time frame required to fix it. In that sense, they neglected to set expectations. As a result, they're frustrating users and getting blowback from bloggers. So, essentially, their biggest mistake is in the public relations arena.