I doesn't even fucking matter how old you are. If a kid hears a song by led zeppelin and he likes it, then gg to that kid.
@pulse: Let's not be an opinionated prick. They're (in my opinion) one of the best bands for that genre but not one band can be the best band around. You can only think that a band is the best.
However, Led Zeppelin are fucking sick, I must say.