Once again, I'm not trying to justify anything - but look at the sq footage on his house. Reports are in the 10,000 ft range. Who knows what the "average" hoem size is that they used in this article, but I'd bet bottom dollar it's biased to the low end to work in their favor (averages are always heavily skewed by high numberes and shouldn't be used w/ things like thsi anyway, median is better!)
But lets say it's 1,500-2,000 sq ft.
That makes Gore's home 5-7.5x larger. Now, energy use per sq ft is not linear, it gets bigger faster on the high end - by 3x+ the average for "small" buildings does not surprise me at all.
All I'm saying is that you really have to be careful about reports like this. Clearly somebody is out to make a point that may or may not treally be there. Make sure apples=apples etc.