In case you do not know who he is, check his Drupal.org profile and here is a quote from Eric Reid's blog:
...Bay Area Drupal Camp this weekend. All types of people from all backgrounds. And then there was Dmitri.
Dmitri Gaskin is a key member of the Drupal Community... a commiter... an expert... a 'Ninja' if you will... Dmitri gave several talks here this weekend, and people listened to him with interest. He knows what he's talking about. He's only developed on Drupal for a relatively short time, but he gets it, bigtime. Dmitri's definitely The Man.
Oh, and by the way... Dmitri is 12 years old.