iPhone 4S iOS 9 GM / Final vs 8.4.1 CLEAN install no backup loaded.

This test is made on 2 freshly restored iPhone 4S. No data / backup has been loaded, no apps has been launched. Except for Appstore to install Geekbench. Does it make it faster? Will you delete your iPhone and start all over? Music : Good to Go by Gunnar Olsson