Can iPhone 4 and 4S handle iOS 7?

[Virginaustralia]

My friend has a iPhone 4 and he says its very fast no lag whatsoever

 

[therealjustin]

Everything runs just as fast as it did with iOS6 for me.

 

[migdaddy]

Works perfect on my 4s. Battery seems to have taken a slight hit though.

 

[GoneMad]

Near the bottom of this page there is a quick video of the two iOS running on the same phone. I can see the difference, can you?

http://arstechnica.com/apple/2013/09/new-lease-on-life-or-death-sentence-ios-7-on-the-iphone-4/

 

[lexdiamonnyc]

same as a few others, runs smooth.....battery life runs out faster...

 

[PlanetFree]

Define "smooth". A lot of people are saying the animation framerate is bad.

Smooth meaning fluid no lag better than IOS 6 performance SSSSMMMMMOOOOOOTTTHHH

 

[Altis]

My 4S seems to run it perfectly fine, but only after I used the reset all settings function.

 

[cmeisenzahl]

Working very well and snappy on my son's iPhone 4.

 

[FoxFifth]

Works well on my iPhone 4.