the field wrote:
back when I ran 14:15 for 5k, easy days were 6-6:30 pace.
later when I got old and ran 2:29 for the marathon, it got up to around 7 min pace plus or minus 10 seconds.
6:30/mile?! Thats about 4min/km....Sounds way too fast man, either that or your PB doesn't tell the whole story.