A less misleading headline would probably be "Windows Phone sales in the last 3 months double in Europe. Share of new sales trails iPhone by only 1% in Germany"
Cite: http://venturebeat.com/2013/09/30/windows-phone-doubles-shar...
"... reflects the latest three months of actual smartphone sales, which the research company gets by interviewing actual consumers."
Always makes me twitch when I see statistical simplification in the headlines.