[logicallee]

or worse, you can only hit a billion dollars in valuation without testing.

(might be a true statement.)

[hoverkraft]

I disagree with this pretty strongly. Somebody posed a similar question in the blog comments, and I think I did a decent job of answering it: http://nerds.airbnb.com/testing-at-airbnb/#comment-13289

[hoka]

you did. Thanks for answering! I'm definitely the one leading the (small) group of devs who test here. Your article was great motivation for our cause.