As someone who has worked at Google for a few years, I can&#x27;t agree with the author&#x27;s characterization of tech behemoths.  While they have embraced the start-up mode of doing things for some new projects and are very free with their investing, their core business is everything you&#x27;d expect from a big business.<p>I&#x27;m not sure it&#x27;s possible to grow as large as Google, Apple or Facebook and remain agile.  The product and organization gains too much inertia on its own.  Even if you have a brilliant idea for improving the product there are hundreds of people you need to convince, months worth of meetings and reams of design docs required.<p>The big companies may be innovating on the edges, but their established products are all ripe for disruption.<p>Of course, if you look too disruptive they&#x27;ll probably just buy you with their mountain of cash.