Slide to delete can be used in the sms and email list. slide your finger from left to right across any message you wish to delete and the delete option will highlight for that message alone.
What's weird is that this doesn't need to be a double tap. It can simply be a tap with two fingers, and it does teh same thing. I'm starting to wonder about "UI Consistency" and what the hell certain Apple UI engineers were thinking when they implemented so many ways to do the same thing which are not necessarily consistent across the phone.
Slide to delete can be used in the sms and email list. slide your finger from left to right across any message you wish to delete and the delete option will highlight for that message alone.