Unfortunately, Obama is an exceptional case, and the research does not back you up.
http://en.wikipedia.org/wiki/Teenage_pregnancy#Impact_on_the...
Furthermore, correlation does not imply causation. There are many factors at play, including the correlation that many teenage mothers are also single mothers.
Actually, her mother was the one who raised him. Barack's mother ditched him with her parents so that she could live with her husband and daughter in Indonesia.
Anecdotal, yes. But your comment relies on a stereotype. How do we know that teenage mothers do not quickly start maturing from the point they become teenage mothers, relative to their peers? They almost have no choice.
(I say that knowing of some concrete counter-examples to what I just argued. But that's just anecdotes, too.)