I am to decide wether to use a comfortable function that was introduced with iOS 3.2 versus a rather complicated implementation that works fine with older versions too.
3.2 does not run on first generation devices.
Are there any statistics available that tell you how much of a potential market is excluded by setting iOS 3.2 as a minimum requirement?
(source: jcmultimedia.com.au)
There you go. Basically, everyone uses 4.x. Nothing to fret about.
This is the link.