As blogger Tim Mallon put it, “I started to see and (sic) ugly side to Twitter, far from being a crowd-sourced version of the news it was actually an incoherent, rumour-fueled mob operating in a mad echo chamber of tweets, re-tweets and re-re-tweets.
“During the hour or so I followed on Twitter there were wildly differing estimates of the numbers killed and injured – ranging up to 1,000.”
What is clear that although Twitter remains a useful tool for mobilizing efforts and gaining eyewitness accounts during a disaster, the sourcing of most of the news cannot be trusted.
In the next paragraph, CNN notes that most tweets “were sourced from mainstream media.”
On the other hand, I see a tweet from Mrinal Wadhwa that says “mainstream Indian media has been absolutely Irresposible during this whole episode.” I suspect that in some locales the best information available was crowdsourced, mostly via Twitter. You can see for yourself – relevant Twitter posts have the #mumbai hashtag and are viewable via Twitter search. (While I wrote that last sentence, there were 18 new posts.)