I don't know Tony's system, but shouldn't letter grading be done relative to time of year (i.e. relative to average for that time of year)? To say that December should never get an A rating because mountains are not 100% open and off piste and sidecountry options are not safe yet is severely under valuing actual conditions. Likewise, if we get 3' of snow in November, wouldn't that constitute something higher than a C even if only half of the available terrain opens? And late season in March, there are often times when 100% of the terrain is open but snow conditions are hard, firm, and scraped due to too little snow. That to me is C--at best--even if 100% of the terrain is open.
I think we need to look at conditions across the entire region as well. NoVT could have done a lot better if the storms had been clippers instead of retrograding coastals. On the flip side, an area normally slow to open terrain like Cannon could have everything open except Tramline by the end of this current storm. Damn near historic for Cannon to be skiing so well this early. In a matter of fact, I have only skied VT once so far this season out of 10 days but I have skied Cannon four times.
Many snow making dependent areas in SoVT and SoNH have also done extremely well due to great snow making temperatures and consistently cold temperatures with only a single warm up/rain event all month. December has not been epic by NoVT standards but excepting the Mount Washington Valley, everywhere else looks to be above average for December. It is easy to forget that many Decembers, we are still skiing on WRODs into the New Year with not much powder and many more above freezing and rain events.
This coming storm is going to be massive for December for many areas. Though NoVT again doesn't get in on the best of the action. But I think it will be enough for the region to warrant a solid A in Tony's book... regardless of month.