Twitter's visibility might be high, but as a company they're tiny compared to Google (about 1/20 by headcount). They're also several years younger as a company.

Twitter's visibility might be high, but as a company they're tiny compared to Google (about 1/20 by headcount). They're also several years younger as a company. Those differences could have a pretty big effect on how far down the "mega-corp bureaucracy curve" they are, so maybe compare Twitter today to Google in 2013 (less than half way through Cornet's tenure there). Or maybe he sees a genuine difference in corporate culture, or in technical content, or in work from home policies, etc. How you feel about any one thing at a company can color how you feel about it in general, even if other aspects are actually the same.