The lowest temp I managed was when I returned from an xmas holiday. Came back to a freezing house and turned on the PC to grab my email. Took a quick look at the temps out of interest.
Ambient - 5C
Core - 10C
Lasted for all of 5 seconds before rising up past 30C.
I'm gonna go ahead and say 16C is a believable temp for a 'cold and dark' startup. It obviously won't last for long though for reasons already mentioned, and to claim a 16C idle temp is a bit naive.
AdladUK, it might do you some good to pay more attention to those who are trying to help you. No one here is trying to put a downer on your obvious excitement with you new kit. Most people here are simply trying to allow you to understand the ins and outs of your PC a bit better. Needless to say this is one of the most pointless threads I have ever come across. I would hope all of us have better things to do on a Saturday night than have a lengthy disagreement over a minute error with someone who is obvious (and quite understandably) defensive of their brand new hardware.