In reality, whatever your comfortable with ... i can go for a run, and sur eif you break it down my average mile might be about 8 - 9 minutes, but starting out im prolly around 9-10 ... not like I'm racing, just trying to get some cardio in and build the heart rate up.
So really its whats comfortable for you for now ... work on going further then work on reducing your time ...t hats my 2 cents anyways.
what good is being able to run a 6 minute mile if you can only run one of them?