Your article compares the number of browsers shipped, but batista was talking about mobile data traffic. He's asking, "How many people actually use the 'smart' in smartphone?"
http://www.netmarketshare.com/browser-market-share.aspx?qpri...
iOS originates 61% of mobile data traffic vs. 19% for Android.
http://marketshare.hitslink.com/browser-market-share.aspx?qp...
This makes it pretty unlikely that your stat about data usage is right either.