Guess I never thought of "base" elevation too, If Killington was measuring at K1 for a period of time, that is 1000-1500' higher than the base areas of Sugarbush, Smuggs, etc. and like measuring mid-mountain at many areas. I have only been really skiing and paying attention to snow the past 10 years, and from that my mindset is Killington is more similar in snowfall to Okemo than it is to Sugarbush.
In regards to Jay do they over report, sure. But the wind definitely distributes things around and makes it hard to measure. There have been times I have hit Staircase/Everglade area and there is a 3-4' base meanwhile you are hitting stumps and root systems in Canyonland or Deliverance.
Check out Killington's report and the webcams this morning. Penny and nickel to 250!