Bieng 14 is ftw!

:D 15 in 3 months :D
You'll probably find that there were a reasonable amount of younger kids as well, once you were younger.
It's probably now that you're older, you can actually notice that young kids can be really annoying at times, which is why they stick out like a sore thumb for you.
There's probably the same ratio as there has been before, of younger:older kids.
Also, the fact that the game is expanding with new players all the time, it isn't unlikely anymore that you'll meet more people from younger age groups.
It's just one of those (sometimes) troublesome signs that this game is progressing further.