Yeah it's an interesting discussion. Many look at it as the final snowfall total when the season ends. Because of that, I think it's always hard to forecast a "ratter" when even 1 big snowstorm can remove a lot of locations in SNE from ratter territory if it's purely by snowfall totals. You could have the worst winter pattern imaginable for months on end, but pop one KU storm on the way out of winter in March/April and it's no ratter.
Say you average 47" of snow a season. You get an awesome 12" storm in late November. Then for the next 4 months (Dec/Jan/Feb/Mar) you add only 6-8" (no more than 2" in any one system) in what is one of the most brutal 4 month winter stretches for a snow lover. April 1st you get a 1997 storm with 30" and it's a top 3 lifetime storm... but it all melts in a week or less because it's April.
That winter ends up with a seasonal snowfall of 12+8+30 for 50" total... above normal snow on the season! But for 4 full months, through the heart of winter darkness, you never saw more than 2" at a time and only 8" total in one of the worst stretches imaginable.
That winter feels like a 50" ratter, ha.