Wow, if that clip is a fair representation showing propeties suffering shadows flashing across the house, it would seem a bit extreme. Certainly I would be happy to see one or several in the medium distance from here, but to be in the shadow would drive me nuts.
Desp
There are youtube videos of some horrendous shadow flicker in the US.
The US is worse as it is sunnier and the turbines in the video I saw were REALLY close to houses.
In the UK if the shadow flicker exceeds 30 mins per day or 30 hours per year, controls are placed on the turbines to mitigate against this.
Shadow flicker only occurs 130 degrees of North of the turbines and only for approximately 10 rotor diameters.