Either when my mind was less "quick", or when Wikipedia had stronger editorial control, I could read an article and believe what I read to be of high value.
However, things have changed. I have to remove graffiti just to read a story on wind turbines, some portions are in en-world, not en-us (by using metres, instead of meters, but really instead of feet). Also, the information is not organized according to logical means, mostly just a hodgepodge of information.
=== WIKIPEDIA INFO ON WIND TURBINE ===
LARGEST - The world's largest turbines are manufactured by the Northern German companies Enercon and REpower. The Enercon E-126 delivers up to 6 MW, has an overall height of 198 m (650 ft) and a diameter of 126 meters (413 ft). The Repower 5M delivers up to 5 MW, has an overall height of 183 m (600 ft) and has a diameter of 126 m (413 ft).
TALLEST - The world's highest wind turbine of company DeWind is located in the Andes/Argentina to 4,100 metres (13,000 ft) above sea level. Turbine type D8.2 - 2000 kW / 50 Hz was used for that site. This turbine has a new drive train concept with a special torque converter (WinDrive) of the company Voith and a synchronous generator. The WKA was put into operation in December 2007 and has supplied the local gold mine with electricity since then. 
NORTHERNMOST / SOUTHERNMOST - The turbine closest to the North Pole is a Nordex N-80 in Havøygavlen near Hammerfest, Norway. The ones closest to the South Pole are two Enercon E-30 in Antarctica, used to power the Australian Research Division's Mawson Station.
POWER PRODUCTION - THE MOST PRODUCTIVE WIND TURBINE was Matilda located IN Gotland, Sweden. It produced a total of 61.4 GW·h in the 15 years it was active. That is more renewable energy than any other single wind power turbine had ever produced to that date. It was demolished on June 6, 2008.
Anyways, it used to be a serious tool (wikipedia) to me, but for doing any serious work, you definitely need to do your research and go elsewhere.