I'm starting to look at reviews of the iPhone 5 and specs. Why some features need a more powerful graphics and arm processor.
It will be shopping season.
It may hinge on iOS 5 being ready. And you don't want to jump the gun and have too many bugs and issues and disgruntled customers.
I bit the bullet myself. Can always be sitting waiting and really just begun to learn. Also, I really needed some good extra stand alone power and cables. So I don't have to connect to a computer to charge. And no cheap wall adapter that I need to fear. Made the mistake of connecting to 2nd "non-home" computer and thought I didn't do any harm but afterwards when I went back to the computer my iPod is married to had nothing but trouble synching content that took time and learn what I did wrong.
Also, multitasking does not work as well on 8GB (I think they should bump the base to 16GB) to have more room for apps, storage of cache for not just Safari but everything else.
Six months after a new model is probably safe sweet spot. Any revisions to chips and hardware, tweaks to iOS needed. Anything new or updated built on what was done before is still a little like "1.0" in some regards.