According to Arstechnica, using stats from the mobile advertising firm AdMob, iPhone owners have been reluctant to upgrade their phones to firmware 3.1, with most remaining at 3.0x or even 2.2.
The numbers come from ad requests via apps, so users still running 1.x software are not even included in the report.
The report also shows that iPod Touch users are not fans of paying for their firmware updates, with only 35 percent of users updating.
Pic via Ars:












