The 2011 Web Analytics Review

So the stats for the average website in the word are:

  Pages Visited = 4.5%
  Bounce Rate = 47.0%
  AVG. Time on Side = 4:50min

  Traffic Sources:
  Direct: 36.8%
  Search Engine: 28.0%
  Referral: 19.4%
  Other: 15.8%

  Operating Systems (increase last year):
  Windows: 84.8% (-5.1%)
  Mac 5.2% (+0.7%)
  Linux 0.7% (+0.1%)
  Other 9.3% (+4.3)

I can only assume that the increase in Other-OS are due to the rise of mobile. Which would mean, around 9% of all traffic are from mobile phones? This number seems unrealistically high to me, what am I missing?