If we can all agree on this? Based on what evidence?
I believe the onous is on yourself to back up your claims, not for us to seek eveidence that what you claim to be true is infact true.
If say you were to go down to a wind farm and take wind speed measurements; not once but once a week (or more) over the course of a year to take into account weather changes over the seasons and then present us with your data we would have reason to listen to you. You kindly provided a link which I followed and read the part you noted - perhaps I am missing something but this is the same circular argument you have been posting already and nowhere does it state the reasons for any wind speed changes only that the windfarm is the cause. Why is the wind farm the reason for loss in wind speed?
Please back up your claims.