Can confirm almost all Computer Vision professors I know work or have worked at Google/Facebook/their own startup at some point of time. Also these Professors have tenures (currently on sabbatical etc.). This is actually a great thing for graduate students too. Internships pay very well and can even extend beyond summers as part-time contractor positions. Another common method as highlighted in the article is to convert research group into a startup which gets acqui-hired by Google etc. E.g. Geometric Intelligence would be a good example.
