If I haven't succeeded by mid 20s, can I still be successful?

This was also posted just a few days ago: http://news.ycombinator.com/item?id=2322798

"At age 28 Genghis Khan had nothing and was barely starting to get control over his own small tribe. He eventually ruled over the largest land empire in human history"

Still though, basically just a ned.

Everytime that I have a thought like that I'm reminded of a poem by Anis Mojgani that really moves me http://www.youtube.com/watch?v=gQAC3WXOOWE.

I just love the ending, "Already am. Always was, and I still have time to be."