Fast responses to email was just cited as a key factor in founder success in Cowen's "Talent". He quoted Altman, who apparently ran some rudimentary data analysis based on his own emails while working at Y Combinator. Obviously Knuth is not successful as a founder.
Should have (2022) in title. It reviews "Talent: How to Identify Energizers, Creatives, and Winners Around the World", by Tyler Cowen and Daniel Gross.