And the real answer to this is that getting large exits takes a long time. Unless I'm mistaken YC, which is older than Techstars and has 50% more portfolio companies, has 3 exits over 100 million, OMGPOP, Heroku and Twitch. Granted the last one was a big one.
Techstars should see some other big exits over time with SendGrid (couldn't find actual current valuation) and DigitalOcean ($153M Valuation in 3 years) to name a few
http://betaboston.com/news/2014/09/16/product-design-startup...
And the real answer to this is that getting large exits takes a long time. Unless I'm mistaken YC, which is older than Techstars and has 50% more portfolio companies, has 3 exits over 100 million, OMGPOP, Heroku and Twitch. Granted the last one was a big one.