According to Nielsen, Apple's iPhone was the most popular mobile device in 2009. But that's only true if you ignore the entire planet outside of the United States and don't count different Blackberry devices as being part of the same product line. In other words, it wasn't really the most popular smartphone of 2009, but since everyone loves Apple we're going to say it was, and eventually the sales will catch and meet our expectations.
As the number one smartphone of 2009, the iPhone was responsible for just 4 percent of all mobile device users in that year, well ahead of number two player RIM Blackberry, which accounted for just 6.3 percent of the installed base. Yes, that's seriously what Neilsen reported.
In other news, the iMac is the number one PC (if you don't count PCs that aren't all-in-ones), and Yahoo! is the top website (if you're on drugs).
Source : Paul Thurrott's WinInfo blog