I go up to his place all the time. My take is that his numbers are a little inflated. For example, he was saying a couple days ago he still had nearly full coverage in the fields and woods. That was bullshit when I went up there. I found many bare areas, anywhere facing south. One thing to remember is my property is probably the most open and south-facing plot there is in all of Randolph Hill. The CoCoRaHS guy is in thick forest and his plot is flat instead of sloped towards the south. He has a huge barn in the middle of his wooded area with a field behind it, and that is apparently where he does his measurements. I could see that holding on to snow for a long time. There is still some snow there now. So the conclusion is he isn’t slant-sticking per se, but he is measuring in a nano-climate spot basically.
Also, my south facing cam is not going to be a great judge of depth compared to even the other side of my house. It gets baked with solar every day.