Yeah no doubt its warmer. That shouldn't be affecting model performance though....in fact, if anything, our model performance has vastly improved in the past decade. Tracking a storm even 7-8 days would get you laughed off the forum with a weenie tag 10 years ago. Now, we've often tracked some of our biggies that far out (or even longer). It used to rarely be like that....now it's not super uncommon even if still abnormal.
I think the model changes are just more amplified in everyone's mind when we haven't gotten shit for snowstorms and we keep missing our brief windows of favorable setups.