Is will be very slow to update iPhone 4 to iOS 6.0.1?
Actually I just asked someone who updates iPhone 4 to iOS 6.1.2. After updating, it’s ok for common operations, but if want to run large programs, of course it is very slow, but acceptable still. It is not that serious like can’t stand the speed.
Fluency of iOS 6 and iOS 5 is almost the same, I think. The new version is not that smooth like old one, but it has more functions, of course.

There are 6 Comments. Load 'Em Up. Show speed reading tips and settings
Shortcuts to mastering the comment thread. Use wisely.
C - Next Comment
X - Mark as Read
R - Reply
Z - Mark Read & Next
Shift + C - Previous
Shift + A - Mark All Read
Comment Settings
Live comment alert: Hide it!
Something to say? Choose one of these options to log in.