When you push up, up, Ctrl-A right right right, you don't have to sit there for 5 seconds and wait for the machine to decide it feels like fulfilling your request and showing you where the cursor is now so you can get on with what you were doing.
If you're not on flaky wireless networks a lot it might not be a huge difference, but from my experience today it was a big difference.
Haha no problem. Yeah, Ctrl-A, Ctrl-R, Ctrl-K, and Ctrl-right/left are godsends for mucking around in the terminal, in case there were others of those you didn't know. Probably there are lots more but those are the ones I use all the time.