I have only seen one machine so far that can come close to that label.
Certainly not descriptive of my normal experience with it though.
Show floor and several home "8" devices have been unstable, ( many were brand new now more than a few hours old system(s)).
All failing in different and totally unpredictable ways.
As far as win 8 tablets go, they task swap very similar to any other OS on tablet hardware.
Nothing special about how it handles anything compared to others at all, just to me it is more irritating .
But then, IOS and Android have their downfalls,
IOS... only lets you have what Apple thinks is good for you, * flash missing* ( partially rectified by a jailbreak)
Android, still needs rooting on big name devices, but restrictions in the play store are much more lax.
My biggest beef with ALL of these three is the lack of a good terminal emulation.
Maemo does this VERY well but is a dead OS, hence my ravenous protection of my n900, and refusal to change phones.
I cant wait until a linux distro ( like ubuntu) gets ported to work well on a droid. Just hope they dump that ubuntu on crap.