Since October of 2009, we have had an agreement with Twitter to include their updates in our search results through a special feed, and that agreement expired on July 2.
While we will not have access to this special feed from Twitter, information on Twitter that’s publicly available to our crawlers will still be searchable and discoverable on Google.
Although real-time search included other streams beyond Twitter, the stream of tweats was by far the most dominant and Google’s once useful service has been disabled.
Yes, I think this is more than a coincidental occurrence.
For more information:
As Deal With Twitter Expires, Google Realtime Search Goes Offline – SearchEngineLand