He's probally implying that 14 year olds are less skilled in the departmant, due to lack of experiance. I am 15 and have been tinkering with stuff most of my life (stuff like dirtbikes/ATV's/snowmobiles, random electronic devices, nitro r/c cars) so I have a little bit of experiance in the like.
Looks like you either have quite a bit of experiance or you're just natural.