> At least the iBook would come out of sleep when you opened the lid, I don't think Windows laptops could manage that until 2007.

I think that was very hardware-dependent. I don't recall what hardware I had, but it had a > 90% success rate of resuming from suspend and/or hibernation under Windows XP.

Apple's advantage there being pretty obvious: they control the entire range of hardware

> You still have to turn off USB power management on a windows machine to avoid serious problems just as you have to turn off Bluetooth power management if you don't want to be connecting and reconnecting your headphones several times a day.

The irony being that I still have to turn wifi and bluetooth off and on on my macbook air regularly today, as airplay stops working every ~10-20 transfers / every other week.