Surprising Smartphone Statistics?

I don't know about you, but I found this bit of data on smartphone use surprising.  According to Nielsen, when looking at smartphone use with a baseline of 100, smartphone users  disproportionately tend to be 18 to 34 years old. 


One wonders what happened to the BlackBerry users between the ages of 35 and 54, whom one might think are over-represented among the ranks of smartphone users. 


Granted, this is an index with 100 as baseline, so it is more an example of "over-indexing" among some segments, but the findings still surprised me.


That was especially surprising given the over-indexing of smartphone used at least in part for business purposes. 


While smartphone usage is shifting from purely business use to both personal and business use, owners are still more than two times as likely to own a smartphone for business usage only.  


The study also suggests smartphone owners continue to be predominantly male, are 65 percent more likely than the average mobile subscriber to be between the ages of 25 and 34, and nearly two times as likely to make more than $100,000 a year.