1) I can delete more junk mail faster on the phone than a computer.
I accidentally found an easier way delete and it took until today to figure it out. If you swipe right with your finger on an email in a list a "delete" message comes up on the right directly under your finger. (To repeat this I thought you had to swipe starting on the right and it would work every once and a while. You have to start the swipe right way in the middle of the message title.)
Tap and gone. This is way easier to delete a slew of junk from the iPhone than it is on a laptop.
Does anyone have a link to these hidden features in the iPhone that are not obvious?