On equal hardware, GNU/Linux tends to be faster than Windows, and I wouldn't be surprised if Apple were the same. There's a lot of boot tricks that can be used to speed up a login, but I don't add or deduct points for that. I seldom boot, so it doesn't matter to me how fast it is.
More important is once you get into the OS, how long you can stay in it before having to reboot it. And Linux is probably king of that by a long way.
On equal hardware, GNU/Linux tends to be faster than Windows, and I wouldn't be surprised if Apple were the same. There's a lot of boot tricks that can be used to speed up a login, but I don't add or deduct points for that. I seldom boot, so it doesn't matter to me how fast it is.
GNU/Linux can boot in <12sec including POST?
Who the hell turns off their computer any more, other than to do windows updates?
My experience has been that Macs boot very quickly. I recently changed out the drive in my Mac Mini with an SSD, and it boots from power button to desktop in about 10 seconds.