For 500N's benefit, there is data now coming to light that supports yr-right's argument.
Published wery recently at:
http://jennifermarohasy.com/wp-conte...ature_Data.pdf
Jennifer at last has published on a range of issues, which most people are called 'skeptics'. I like to think that it is a proper look at data and that an alternate view can be substantiated.
Sorry to come in late guys, but only just got up to speed on this subject in past couple of weeks.
There is a lot of reading in the background and some good documentary evidence:
Wind Farm Aviation Policy
Wind turbines ? Related Information | Assistance to the Aviation Industry
and:
Wind Turbines | Assistance to the Aviation Industry