While it might seem dumb to ask what constitutes "talent" based off of low mileage (why not just up the mileage?), I think there's value in the process nonetheless because:
1) If someone is relatively new to running, he won't be able to handle high mileage right away; and
2) Someone who could be healthy and relatively fit running 35-45 miles a week would be more inclined to up his mileage if he thought he could achieve some success in the sport.
So what do you think? If a 20-something male takes up running and spends a year gradually building up to 40-45 mile weeks by the end of the year, what times would he have to run to be considered "talented"? 5k? 10k?