In hibernation, the ram is dumped to the hard drive and shut down, then reloaded to ram when booted. It does go through some kind of boot cycle, but a fraction of what a cold boot/reset cycle is. Hibernation is basically "off". There is still some parasitic drains possible if you have them set in your BIOS, like boot from ethernet or keyboard. Wakeing from hibernation takes way less time than a cold boot, but not as fast as sleep.
In standby, the ram is kept active along with some other minor circuits on the motherboard, and depending on BIOS settings as well, you'll have the parasitic drains I mentioned earlier. Everything else is off, CPU, HD, Video card, etc. Fans should not be running, unless the power supply is too old to recognize the sleep command. Moving the mouse to wake from sleep takes only seconds.
I'm thinking at your office you have the power settings set to shut everything off without actually telling the system to sleep or hibernate. Most computer components can be shut off without having to actually turn the computer off (fans continue to run, but can be slowed down).