Modifying wind patterns will very obviously have an effect on local climate. Local is the key word - these guys are talking about and increase of under one degree, directly above those wind farms, and it seems likely that this is caused by the small amounts of turbulence generated by the turbines.
Now, if evidence emerges that this is harmful in some way, then we should of course evaluate that and make sure we understand the effects. However, I think stating "Wind Farms Can Cause Climate Change" is clearly intended to sensationalise this research and attract page views - especially given The Telegraph's well-known rabid-anti-environmentalism (they're especially anti-wind-turbine.)