Our utilities company provides us with a year to year comparison of our gas and electricity usage. The October bill surprised us tremendously, but the November bill has proven that it is a trend.
Our total gas and electric bill for 2006 was nearly $260. This year it is closer to $130. Our heating season is only 3 - 4 months so we won't enjoy this level of savings for long. I'm sure going to enjoy it while it lasts, though.
I have some hunches about the increase in electricity. It is likely a combination of the geothermal pumps that run constantly to circulate the fluid, and us being gone for two weeks during a cold snap and the person house sitting turned on an electric blanket that we found was still on when we got home. I'm going to look at the pumps and see how many KWH they use and calculate how big of an impact they are having.