Well you know people have different taste! Apparently some people call it "warm," some call it "dry," and some say it prevents the system from getting too warm! Makes you wonder if they are listening to the same DAC. I wonder if the source computer, software, and USB cable are affecting anything here.
I think the issue is more that descriptive terms are completely objective.
I personally like the X-Sabre's presentation no matter how it's described because I feel it doesn't add or subtract anything significant to / from the sound. That means I can then tweak the sound with tubes etc. if I want to. A previous DAC I used was a bit warm which made it hard to come back to the middle if I wanted to. It's easy to add warmth, but hard to take it away.