I went from 4.1 to 4.2. I found that 4.2 was better than 4.1 but I was still seeing delays of 1-2 seconds sometimes between my finger touching the screen and the response on-screen and, on occasion, delays of 3-4 seconds too; the only applications I use are the phone, contacts, reading simple emails, texts, Calendar, occasional Notes and Clocks. I have no 'added' applications and never use the other pre-installed apps like iPod, iTunes, Photos or Maps.
On my main computer I'm still on iTunes 9 and decided to revert to 3.1.3. I found 3.1.3 reliably responsive and it eliminated the continuing, tho reduced, delays I was seeing with 4.2. I tried 4.2 and 3.1.3 within an hour of each other and I definitely found 3.1.3 quicker and more reliable on the simple stuff I do. So for the foreseeable future, I shall be sticking with 3.1.3
Can anyone tell me - if I were to upgrade iTunes to 10, would this prevent me from re-installing 3.1.3 in the future if I should need to? Is there anything about running iTunes 10 which would force me to "upgrade" to IOS 4 again? and is there anything I'd NOT be able to do with iTunes 10 which I can with iTunes 9?
Thanks for your help.