I thought so too, but my recent experience with a Zenbook has changed my view. WiFi drivers were so bad it took half a year after my purchase before the connection became stable (not dropping every 15 minutes requiring a reboot). Touchpad drivers were also a mess with awful kinetic scrolling. And just couple of weeks ago it stopped booting Windows altogehter (something related to ACPI I guess, Linux works if I don't use suspend). Conveniently one month after the expiration of the warranty.
The WiFi drivers are made by Intel, but yes, they were
terrible (blue screen). I had to downgrade back to the drivers that came with Windows for while but the latest versions seem to be fine. I'm using some stock touchpad drivers that don't seem to have any kinetic scrolling.
Maybe Windows is terrible, I've heard lots of bad stuff about the wifi and touchpad drivers in particular. I installed xubuntu the day I got it and everything worked out of the box from day one. Power management on ubuntu 12.04 wasn't so great, but battery life became significantly better on 14.04.
Additionally, a roommate spilled a pint of beer on my computer and Asus replaced it for free, despite not having an accidental damage warranty.
