I just got an Xbox One, I pretty much just turned it on and even with no disc in it it's pretty damn noisey. It doesn't sound right though, like it's a noise that shouldn't be there. It's a whirring sound coming from it. Is this normal?

Here's a video to show you what I mean: https://www.dropbox.com/s/53r01qaoy5wgrst/VIDEO_20141016_173620.mp4?dl=0

If you're concerned, I would give Customer Service a call to be sure.

I don't have any experience with Microsoft's service, but when I bought my first PS3 Slim (replacing an original fat one), it sounded like a jet engine so I called Sony customer support who took one listen to it over the phone and they swapped it out by courier the next day.

I think I saw somewhere that Microsoft was replacing Xbox Ones that were too noisy. It might be worth looking into.

nope - sounds like the fan is catching or the motor isnt working properly

No, it should be next to silent unless it's installing a disc.

Well shit. :(

Mine is totally silent, so yeah you should probably contact customer service. Sorry for the bummer situation.

No, not normal...
Exchange it for another if you can or call MS.
My One is pretty silent.