On 26th Jan (a day after the first major day of organised protests), he tweeted:
Hey @"[left blank]", #Jan25 proved you wrong. Revolution can be a #Facebook event that is liked, shared & tweeted. http://nyr.kr/bYKeLq
The person he was addressing had written an article in the New Yorker (the url in the tweet points to that article) last year called "Small Change: Why the revolution will not be tweeted.", the main thesis of which being that many exhibit a slack form of activism on new-age social media .
Who was this person with whom he disagreed?