Yeah, I'd say the frigid temps have played a part in that. A lot of guys, myself included, are banished to the porch or garage to enjoy our smokes, and when it's 20 degrees with a 10 degree windchill, sometimes it just ain't worth it, lol. Once the spring thaw hits, I expect things will pick back up.
It is never worth it. No way to enjoy even an Opus while in 20 degree weather. Too cold to be able to enjoy what you are smoking.