Here's the fine print:
The Sept 2008 survey by Harris Interactive for 1E can be found here:
Energy usage statistics calculated with the EU Energy Star calculator here:
A 'Value PC' with 17" LCD monitor, left on all year uses 304.2 kWh more than the same computer turned on for 45 hours a week. Multiplied by 13.8 million is 2,863 GWh.
Turbines are calculated as 870 x 1.5 MW turbines x 365 days x 24h x 25% capacity = 2,858 GWh. Research taken from here: wind-watch.org/faq-output.php