Guys, to be honest some of the technical detail you've gone into is over my head. You are probably right about how more advanced modern PC operating systems are, in particular how their multitasking systems and memory protection ought to make for a more responsive system. What i can argue though is what I see in front of me with my machines.
So I got out the 060 A1200 and just had a play with it. No executive or other speed hacks. I set up a Real 3D animation render in 640x480 24 bit shadows, reflection, refraction antialias, saving each frame progressively to hard drive, basically all knobs on. I screen flicked to workbench: it was instantaneous. On workbech screen (8 colors 640x480 productivity) the mouse pointer moved as smoothly and precisley as if nothing was happening in the background. I double clicked my hard drive partition with 25 drawers, no delay in opening and displaying them in window. I started unarchiving a 10 meg zip file to hard drive with Real 3D still going. I closed the window, the close gadget responded instanteously to my mouse click. Opened the partition again, no delay. Opened the games drawer with 28 drawers, no delay in displaying the window contents. Dragged the window, no delay in redrawing the window. Right clicked to bring the Workbench menu bar, which has 11 menues, many with submenu. Sliding the mouse pointer along the menu bar, each menu drawn instaneously drawn, no delay, no screen garbage left behind, no overlap of each menu as a new one is erased, no sticking or skipping of the mouse pointer as I slide it down each menu, mouse pointer totally smooth. Don't forget both Real 3D and the archiver are writing periodically to the internal hard drive.
Yes it takes longer to do the render in Real, it takes longer to unarchive the zip, but THE SYSTEM is still very snappy.
Contrast this with Vista on my 2.4 ghhz c2D with 4 gig ram and 7200 rpm hard drive and 256 meg Geforce 9200: The start menu jerks up, especially if I select the orb whenever anything is being read/written to the hard drive. The mouse pointer jerks as well, disappearing and reappearing somewhere unpredictably. The system cannot highlight each item in the start menu as I move my mouse pointer, so it "jumps", ie it can't keep with the mouse pointer. I am in Firefox on its menu bar and I move my mouse along the menu bar: I can see momentarily an overlap of the new menu and the previous menu. Mind you, I have not started any CPU intensive task in the background. It just feels like the GUI is covered in molasses, a crap user experience. And no its not just MY laptop, I see it on my brothers vista laptop as well. I don't care how many processes it has to do in the bachground that I don't know about, its simply no longer good enough, we should be well and truly past this rubbish with the hardware specs we are running. So yeah you can argue about all the technical advancements of the modern PC and its modern OS's, at the end of the day, what matters is what I see and feel in front of me.