My iPhone is experiencing that slow as molasses behavior that used to affect macs alot back before OSX. takes a long time for apps to launch, etc. Is there anything to be done about that?
You could restore it and setup as new or you could do a reset all settings (NOT erase all content).
If you reset all settings, do you have to reconnect it for phone/internet service somehow?
You'll have to reenter your password for wi-fi and your password for VVM.
That's not so bad! Nothing more than that?
I would, at minimum, restore the iPhone in iTunes. Restore from Backup. Then Reset All Settings.
Curious; how long since last restore? How much music? 1G or 3G?
Not sure how long since the last time it was restored. Never? A year? And it's an 8 gig phone with about 6.5 gigs of music in it. It was almost full, and I took some out, thinking maybe that was contributing to the problem.
That's why. You almost filled it up. It's good to leave some empty space. Some times the iPhone's RAM fills up and uses the space on the NAND flash as Page-outs.
So say your iPhone is filled up, it will slow down when it gooble down all available RAM.
However, as iphone.aggie said before, the best non-restore solution is reset everything (don't erase content). But for best results a Restore and setting up as new is always a plus.