Twitter search is now serving 1 billion searches a day:
http://engineering.twitter.com/2011/04/twitter-search-is-now-3x-faster_1656.html
And according to this, Google is serving about 3 billion searches per day: http://searchengineland.com/by-the-numbers-twitter-vs-facebook-vs-google-buzz-36709
If that's true, then that's incredible. Twitter is already 1/3th the size of Google in terms of searches? Am I getting this right?