This...is so VERY true. I argued this point vehemently in here last year...
Having said that, this is an impressive CAD setup with a big boy high to funnel in the cold, at least at the surface. But like you I'm extremely hesitant to get too wrapped up in some of the snow amounts being spit out right now. My guess is that in the coming days we'll see the snow maps start to back off. (and to some extent they already have)
To be perfectly clear - I DO think this will be a legit winter storm with significant amounts of frozen precipitation here in the Suskie Valley. I also believe that something on the order of 2" -4" before a changeover is more likely than some of the 6"+ amounts we've seen on some of the maps.
One thing I don't like for those of us in the southern tier is that the heaviest axis of precip keeps moving north on the models. As you said, we need good rates to overcome the warming.