Yeah it would be a little peeving to be beaten by a 26 year old at junior world champs. It is probably more prevalent in the men's racing because the women develop earlier and therefore the margins between juniors and seniors are narrower however if probably happens.
Bekele does look older than that you are right.
Is it wrong that I don't feel that angry about it? Some african runners are so disadvantaged in life by western standards that a little age discrepancy (because they don't know their birthday) kind of pails into insignificance. However looking at a world junior silver medalist , second to an older guy my argument would fall flat. It doesn't matter anyhow at senior level.
Except in gymnastics......when the opposite happens-then it really matters , more significantly for women and much more morally wrong for the athletes.
Anyway Matti, how old are you saying you are? Your wise words and (slightly) receding hairline may portray a man more mature than his years