I dont know what they are reporting, nor do I care to re-read that slop of a review. Not a rabid Asus fan, I am as displeased with thier well reviewed stuff as the slammed Asus stuff.
I got more battery with my m6n, but it had the xga screen vs my wsxga screen. That is about the only diff though. I would guess it around 3.5 hours, but battery life depends on what you do too. (quick note- Cnet said about 3.5, that was about right.)
The part where doom3 crashed was an ati driver issue, and if they cant find the ati drivers online, well, whats that tell you about snets technical prowess?? Hehe.
They had a pre release unit for sure.
short answer- 3.5 hours, sometimes more, sometimes less, depends what you are using and what cpu speedstepping and lcd brightness is.