Down with the Daylight Savings!
More seriously, it would seem that instead of saving anything, it could actually even have had a slight increase in power use. There are also some reports of increased car usage, but I'm finding that a bit sketchy (are people really that crazy? maybe I'm just too much of an optimist).
In any case, at worst, it generated this hilarious comment on good old Slashdot. Heh.