Apple’s U.S. Smartphone Marketshare Versus Android For Q1 – Business Insider
Apple Bulls and Bears. This article nicely points out just how off NPD numbers are. If you are naive enough to believe NPD you are missing the enormous opportunity that Apple has in front of it.
NPD is grossly over estimating Android and under estimating iPhone market share. Their method of calculation is clearly ineffective. Read the BI article for the full rundown.
This is why I always ignore NPD numbers in every market that they provide data for.