just to have it said, i am very picky also when it comes to responsiveness , thats why i aint on a PC! using windows!
i wasnt amazed the first time i saw os4 demo'd , but the second time it started to get interesting, 2 months later (around december) i was blown away.
huge changes between theese dates (goes for a1 only ofcourse) , and i cant exactly say its dissapointing to see how its now atm

anyway its like an taste, hard to say and its based on your own opion etc, so i think u have to see it to belive it.
as for the demo on the 8th of feburary,i guess thats the pre release they will show, and as far as i know that aint even final (still sorting out stuff) ... its just a guess and not a quote my point is, if it had been final pre release then everyone of the a1 owners would have it by now, or?
cheers