Its no biggy but I was just curious as to if anyone else experiences this and what causes it. If you press the home button to exit an app then try to open another quickly it hangs for a second, goes into wiggly icon mode then stays floating there. I originally thought it was activator but I don't have it installed and it still happens. My tweaks are; Barrel Springtomize 2 Bytafont
Yeah, its kind of a lag problem, especially in iOS 5. When you close an app, iOS tries to free up memory for the next app. If you have SBSetings and your free up memory, you would realize that the iDevice would be unresponsive. Same thing is happening, so if you put your finger there, the iDevice registers this as a long hold due to the moment of lag. There is a fix, which involves speeding up the GUI with something like Speed Intensifier in Cydia.
Jailbroken or not, this will happen, depends whether you have less or more RAM. More RAM and it occurs lesser. It is due to iOS trying to free up space for something else. Like what I said previously.
One way to fix this is to delete unwanted stuff in /library and/system/library. I freed up more than 150MBs of RAM. Now it runs like a man with a bursting bladder. Even faster than my father's iPhone 4S. And as smooth as ice, or even smoother. This lag thing never occurs to me now.