No reason to flame anyone. I have have owned every galaxy s device including both s2's which included the skyrocket and three models of the note. International, att note and note 2. I say this because I am very familiar with touch wiz and there are not many settings I do not know how to use.
When I got the s4 I was overwhelmed with the sheer number of options. Air, touch gesture etc. I like the phone for the basic smartphone features not all of the stuff it can do. I would not be surprised if someone has issues if much of this is turned on. The s4 has many more features than whatever is in 2nd place. Many of them should be turned off to get optimum performance. Not sure anyone would want them all turn off but many of them are over kill or show off things.
That said many people who have this problem have little knowledge of how to optimize this device for speed or performance so that is why the advice. With everything turned on I am sure it is a slow multi media device. Optimized it is a very capable device. It will continue to receive updates to optimize it even more like the note 2 received.
Just my opinion. Can I wait a few fractions of a second for the camera app to open and load? Yep, because I know the pics are going to be great. Everyone want to load all of these features instantaneously and that is just not realistic. Turn most of them off if you are not using them and it is a different device. And it will get even better in the near future with updates!
Sent from my SAMSUNG-SGH-I337