This could be the Blizzard of 2005 all over again...aka, boston mets discounting snows on the Cape, only to scramble at the last minute and jack up accumulations, or just refuse to acknoledge the fact that we got 3 feet of snow (I'm looking at you Pete Bouchard, called for 8-16 with a changeover to rain, ended up with 36).
Time and time again there's too much model hugging when it comes to rain/snow lines over the Cape with these historic storms (and I'm not just saying that b/c I live there as I'm in the city now). As the LP bombs out heavy banding makes it very hard for temps to actually climb above freezing and change precip (look at 850mb temps and you'll see exactly what im talking about).
Canadian and NAM have Cape as Jackpot with 28-34. This one will be interesting...