Surface Pro Battery Life

[NGC]

If there are any Microsoft employees viewing this site how much truth is there in the speculation that Surface Pro battery life is only 4 or 4 1\2 hours??

 

[Afy]

Given that it lies somewhere between an ultraportable Ultrabook and an enterienly new type of device whay am I not surprised?
Its more of a laplet than a laptop, and somewhat of a tabtop when compared to a Tablet. It is a truely different device that doesnt even quite fit with the hybrid.