Your entire post was full of FUD but I'm replying to this because I don't have all day to argue with people like you on the internet. I dual boot the latest version of Ubuntu and Win 7 on my laptop. Here are the boot times:
Acer 1410t, SU2300 cpu, 4gig ram:
Ubuntu 10.04:
Power button to complete: 35.4s
Shutdown click to actual shutdown: 14.7s
Windows 7 Pro 64:
Power button to complete: 26.5s
Shutdown click to actual shutdown: 7.3s
2/3rds of my boot time is getting past the BIOS screen. I like OSX, but my MacBook Pro both wakes up and boots much slower than my Win7 boxes.
I deployed Windows 7 and Office 2010 to about 2/3rds of my users over the summer. The remaining people are still on XP. I do not fix XP machines any more. If an XP user has a problem with their machine, they get upgraded to Windows 7.
When I deployed it, I literally got 0 complaints about the upgrade, however people told me over and over how much more they like Windows 7 and how much faster it is. In my eyes XP is dead.
One big thing is I had to give up on going 64bit. Too many things we had only had 32bit unsigned drivers. So I ordered all the new laptops with 3gb of ram, which for the average teacher/office worker is way more than enough.