OMG, people who use computer's today have no idea. Back in the 90's, I got a lot of quality experience with MAC computers. The time it took your average MAC to boot into System 6, System 7, System 8, or System 9, took forever!
Yes, its true, depending on the hardware in the MAC, is how fast it would boot into the OS. But reality is, MAC OS had so much junk it had to load in the way of extensions, that the process usually took a couple of minutes.
I stopped using MAC's when they switched to Intel CPU's, so I have no idea if they sped up their boot times or not.