I ran an experiment this morning. I normally have 2 apps running on my phone when I go out - Zenlabs C25K with the perky American voice with my playlist, and the Runkeeper app (on silent as her updates on how fast I'm going is depressing!) to keep a track of the distance and also my average time. I wanted to see my actual running time, rather than the warm up and cool down times, so I ignored the Zenlabs app and walked to where I normally start running. So far, so good.
Started running/jogging to my usual landmark and went just past it, turned round and came back to where I started(ok, to within about 5 metres from where I started!). The app said that I ran for 25.41 minutes and a distance of 2.54km, average pace 10.06 min/km. I have no idea if that's a good pace, but for an overweight 54 year old woman who has never run before in her life I'd say it's not too bad.