My iPhone 4S is slow to go back to home screen?

Hi guys… My iPhone 4S is fairly new. Got it a few months back. When I'm in an app and go back to the homescreen it seems slow. I even compared it to my moms iPhone 4S and my sisters 4. Also when it's in sleep and I hit the home button, it's slower to come up than my mom and my sisters iPhones. I don't have a lot of apps and not very many pictures. Is this something I need to really worry about… Do you think I have a faulty 4s

Did you jailbreak it? And if you did then don't get too man tweaks on it. I got so many add ons on my iPod touch 4g and it crashed. If you didn't jailbreak it then back up your 4s with iTunes and restore it. It usually works. If you don't know what restoring does, it brings your 4s back to the original factory settings. Meaning when you turn it on again everything eill be wiped out and you'll have to set it up again like when you first got it, Don't worry though all you have to do is backup with iTunes and it'll save your photes, contacts, apps with the data in the apps, songs, and more. Hope I helped!