I think we should wait until the storm is finally done before analyzing guidance performance. Guidance typically struggles more in Ninas than in Ninos. Miller B's are also notoriously more difficult.
From the point of view of sensible weather (snowfall) that we all care about, the GFS bros did do quite well if you look back over the last week. They were consistently showing snow maxes to our north. Now whether that was "right for the wrong reason" or not, that's worth a deeper look later this week.