When I first started runnign seriously my first year of high school, I was training with girls. I came in my first track season running 7:13 for the mile and ended up running 5:45 -- we had two girls that were running under 5:50. I didn't think anything of it. Part of it was I didn't realize how untalented I was (that came later), but these were just teammates.
As you can imagine, these were fairly talented girls who had been running for at least a few years, while I had been out for a few weeks. I was consistent in training and somewhere during the summer, I surpassed them so they couldn't run workouts with me anymore.
It still doesn't matter to me -- if they're faster, they're faster -- there are just far fewer than when I was 14.
To think about it, if you're running as fast as the fastest women in your field, you're not in bad shape. At high school that could mean 4:40 and 10:10 -- not bad times, certainly something to build off of. At the world level, that's anything from sub11 to sub14:30 and 30flat and 2:15 -- not bad times at all.