[jnovek]

“… in an era in which people can’t eat a sandwich, let alone invent Calculus, without tweeting about it. I tweet, therefore I am.”

This is just a bias towards people who make themselves visible. I suspect that self-promoters have existed throughout history and that people laboring on interesting ideas in obscurity exist today.

[roenxi]

Indeed. Stopping and reflecting on the perspective reveals it to be nonsensical.

Obviously if someone is toiling away in obscurity for 25 year stretches then they aren't going to be visible on Twitter. Most people aren't on Twitter, and the people who get airplay on Twitter tend not to be the thoughtful types.