@amirm
Let me preface this by saying THANK YOU FOR THE MEASUREMENTS. It takes a boatload of time to do it.
Having said that...
Not waiting stands against the manufacturers reccomendation for optimal sound. But it still provides some data. I understand that there are time constraints and all. However, I can't see this as being representative of an Yggy functioning at full capacity for that reason. You weren't measuring it in the way it was reccomended.
I mean who knows, maybe it won't change at all. Maybe it will. But the guys that repurposed that DAC in to an audio DAC says it does so I'm inclined to go with the designers viewpoint. If you feel there is no purpose to it, I reccomend taking another set of measurements. That way you can both disprove the concept of warm up with this DAC - at least as far as measurements are concerned and you can show that you followed both ways.
For the other posters, fwiw, most people don't see the warm up time as being a sign of a good (read exotic) DAC. Most users including me (Gungnir MB) finding the warm up time a bit of a pain. I definitely wouldn't call it an advantage though. Most of the (subjective) reviews noted its sound change over time and most of them weren't pleased they had to wait.