I guess my bigger issue with claims from manufacturers of this and other products like it is that they are so far from reality.
However, given that, and the fact MS talked about this being that ultimate device for serious professionals, you cannot advertise that type of battery life and expect people to just not at anything or be upset
If I can get 10 hours under normal ordinary working conditions to me that's excellent. When you advertise 13 then MS opens themselves up to criticism. I just feel that there's such an attempt to mislead the very consumers they hope to get and keep it is unethical
In my company, we are straight with all of our customers and tell it like it is, even if it means there's a chance we might lose some. Better to be honest and up front, admitting your mistakes as well as being up front with the true performance of a product vs risk losing all credibility.
Based on the fact that MS has released a half baked device and then has the gaul to tell those consumers an unrealistic set up performance metrics on battery life, which they know mobile professionals rely on and treasure over many other things, shows to me (and many of my colleagues) they don't have the best interest of their customers at heart nor do they really care.