I'm on an iPhone 4 - think the lag would be painful on a 4S, put yourself in my shoes. But mostly I just wanted to comment and upvote because I wasn't sure how many other people had noticed it since upgrading iOS.
(NB: I know the age of my technology is part of the issue. Bought it in early 2011, had it replaced under warranty after 23 months in 2013, have only just started to feel the problem so hoping it lasts until the 6 is released.)
(NB: I know the age of my technology is part of the issue. Bought it in early 2011, had it replaced under warranty after 23 months in 2013, have only just started to feel the problem so hoping it lasts until the 6 is released.)