Sure he can! Aonuma said it in the Japanese interview with Nintendo Dream (the infamous one with the parallel timeline confirmation), translated by The Hylia's Patricia:Well, can Jumbie confirm it then? ¬.¬

By the way, in this game Link’s 16 years old, right?

Aonuma: Being 16 years old is right before turning into an adult. The TV ad of the disc system game Adventure of Link said, “16 years [I have no idea of the context, so that’s just my guess],” so now Link’s 16 years old (laughs).

Aonuma speaks about an adult Link clearly like all adult Links are of the same age. He says the one in AoL was 16, so the one in TP has to be 16, too. From this we must conclude that the one in OoT is 16 just the same, very roughly matching with what Miyamoto said about the young Link being eight (yes I can count, but.. roughly).