I don't even believe the El Nino hype, just as I never believed the global warming B.S. 2003 was an El Nino winter, but that was one of the coldest winters here (Ottawa, Canada) that I could ever remember. 2004 and 2005 also had some major deep freezes here as well.
But this winter has been very mild here, reaching close to 50F on a few occasions. And it's not the first time I've seen such conditions in winter; in fact, I've seen milder.
To me, it's just long term weather cycles and the odd freak of nature.