No PS4 runs "super quiet" all the time. Play Resogun for a bit and then report back. Play Killzone for a bit and report back. When it's idling in menus it's actually quite quiet, but it definitely is one noisy little monkey when it gets going. I've now played with four different PS4s, and they're all IDENTICAL in terms of noise.
1.) All four make "interesting" clicking and whirring sounds for a second when turned on.
2.) All four are very, very quiet initially.
3.) All four can ramp up their fan speeds quite a bit during intensive gaming sessions.
*waits for people to say "No, mine is SILENT ALL THE TIME."
Remember, noise tolerances vary from person to person. The PS4, however, is significantly louder than the PS3 slim and MUCH louder than a PS3 Super Slim. Anyone expecting different is going to be very disappointed, if noise is something that he/she is sensitive to.