Yes, but if you carefully read the article you posted, Disney was making up the shortfall for ECONOMIC reasons, NOT for reasons of being more green. Also, their power budget is stated as $100,000,000 in the article. $700,000 is a whopping 0.7% increase. That's right, an increase of 7 *tenths* of a percent, which could easily be saved by the methods they mention.
The lights going away have nothing to do with this nuclear plant shutdown nor "greenness", as much as you would like to think it does. The cost of running the Osbourne lights every year for 2.5 months is so far to the right of the decimal place as to be lost in the noise of the WDW power budget.