The wind turbines in the illustration seem to be from a different company, probably in an offshore installation. The Enercon turbines discussed in the article look a little different as the direct drive generators (more expensive but more reliable and cheaper to maintain) result in a bulkier nacelle. The rotor blade roots are also a little different. The height of 55 meters quoted appears to be the rotor hub height.
For information about the particular E44 model (a special one for high wind conditions):
For pictures of Enercon wind turbines:
Douglas Woodard, St. Catharines, Ontario, Canada