Sorry I exaggerated a bit. It's about 9 seconds. I didn't show the video of disconnecting power for 1 minute but I can assure you it boots at the same speed as the video. But I think I can get it close to 6 if I get a faster drive in it.
No such thing.
Bios is the Basic Input/Output System. It has 2 main functions, store all the info about the system (board, cpu, peripherals, ram, settings etc) on the EEProm (cmos) and start the operating system. It doesn't 'skip' anything.
The motherboard doesn't 'skip' anything either. It's a pcb with circuitry, has no directives of its own, that's what drivers are for, to provide instructions.
Cmos is Complementary Metal Oxide Semiconductor, has pretty much the same concept as the main system memory, except it has a battery of its own to maintain power in the cells that store all the info stated by the bios.
It's the OS that does everything in shutdown, priming the cmos for bios initiation. When you start the pc, the bios framework is initiated, which then draws the info from the cmos, fills in the gaps, starts the OS. When you shutdown via windows, all the 'stuff' that's held resident in the ram is saved to storage. Faster the storage, faster the shutdown procedure. When you boot, with fastboot, as Windows is initiated it does the same thing as the bios, pulls all that info off the storage and sets it back into the ram. Boom, 8 seconds later you are up and running.
A hard boot/reset is different. That interrupts the cmos procedure, forcing bios to actively search for the hardware, any settings are reverted to the last known good stable boot. Then OS loads, but does not draw from storage, it initiates a clean set of drivers from its driver folder, clean set of drivers from any startup. Boom, 26 seconds later you are up and running.
Fastboot uses hiberfil.sys to perform a hybrid hibernation, that's where the ram is saved to storage. If you look at the drive, you'll see that @ 75% of the size of your ram is dedicated by hiberfil.sys specifically for that purpose. It's not accessible by a user.
Without fastboot, you get a clean initialization of drivers, same as a reset, but cmos isn't affected. Takes 15 seconds instead of 8 with fastboot enabled or 26 from scratch.
Nowhere in any of that is there any 'skipping' of certain things, All must be done since ram will not retain any info after power-out. You either save everything, or loose everything it contains.
My guess is you got told about the fastboot procedure, but that's part of every pc, not specific to that bios or that motherboard.