Per typical, it's going to come down to s/w timing, strength, and interaction of streams. Colder solution of the models now because instead of allowing that lead northern stream s/w to slow, dig, and phase with the southern stream around 120, it sort of zips off to the east, allowing the baroclinic zone to sag south.
It wouldn't completely surprise me to see the models shift back to a warmer setup (with a neutral or + NAO/AO being progged), but we'll have to wait and see.