iPhone 6 launch slows down Windows Phone growth

Yes,the iPhone 6 release has significantly brought down the of Windows Phones.
 In September 2014,Windows phone's growth in Europe was slowed down,according to new statistics,the reason being the release of iPhone6.Windows Phone indeed lost approximately 2 percent of its users in certain markets,some of which decided to give iPhone 6 a try.Significant drop was also observed in UK as Windows Phone lost 4.3% .

Statistics according to Kantar Worldpanel

China,the biggest smartphone market,has not been the good place for a Windows Phone which holds only 0.5% of local smartphone business.The only positive signs of Windows market is from Italy with 13.8% devices in the country.