I upgraded my ipad 4 to iOS 7 about two wks after it came out. I didn't have Internet then. The wait at the bookstore was long when it first came out. I waited two wks and the wait was down to 20 min. Wen it came out, it was 2 hrs no joke.
Anyway, my 4 was really fast and great on ios7. It was perfect. I sold it ydy as I got an Air last week. I still feel weird selling something that was in perfect condition and flawless. That never happened before. I always run my computers right into the ground. Definitely my Macintosh from 1984 which I sold to a pawn shop for a hundred bucks in 1994. Possibly a mistake in retrospect. It was in great shape.
Then I had a powerbook 520 c which I played tons of marathon on. The bungie game. I bought it for $2500 in aug of 1995 but eleven months later the manager of Office Depot let me return it for the then price of $1400. Which I appreciated.
Anyway, I always used all my computers for a long time but apple innovates so much it is hard to resist major advances like lighter weight and thinness, ease of use, looks. I have noticed one thing though, that was better on 4. On my air, I can feel the music and it's vibration and I don't think I like that. It feels flimsy. On my 4 it felt very solid and like the music was completely electronic