Mark Levchin, founder PayPal / Slide:

I actually think that a successful startup is 5 percent good idea and 95 percent execution.

It’s really - it’s just one of these things where can you strike the fear of God into your competitors by releasing every two weeks the features that it takes them three months to write. And by the time they’re done copying the features that you built last week, you’ve got three more months on them. And this is really all about execution.

The devil’s in the details.