This seems like blatant linkbaiting from 37signals, and frankly I think it's childish.

They know quite well (or at least they should) that the reason some companies get a huge cash injection from investors is to grow fast and grab marketshare. This costs a lot of money. It's a risky strategy but if it works it pays off bigtime. The get fast big strategy is obviously not for 37signals, but I'm sure they are aware that there are people in the world that have had success with it. Amazon comes to mind as a classic example.

What Sequoia is saying now is that the get big fast strategy will have to be postponed if you want to survive. And they're right.