"Having been there, I can imagine the dissension @Google to search being warped this way," he wrote. Twitter later followed Macgillivray's post with a more formal statement, in which it reiterated and expanded on his complaint.
Meanwhile, Google answered back with a post on its main Google+ page, saying it was "a bit surprised by Twitter's comments" because Twitter "chose not to renew their agreement with us last summer," a reference to the now lapsed two-year deal which gave Google special access to Twitter's "firehose" of real-time tweets.
However, as Sullivan and others have pointed out, Google has continued indexing Twitter posts and has a massive collection of them in its index, including links to the official accounts of public figures, celebrities and organizations.
Throughout the two-day flap, Facebook officials have remained mum. Facebook has its own special search arrangement with its partner Microsoft, which gives the Bing search engine access to certain data that is out of Google's reach. While Facebook keeps most personal profile content off limits to search engines, its business profiles are public, as well as some other content, and thus available to Google. In fact, for a while Facebook has let individuals tag status updates as "public" and made those available to search engines -- a good example of this is the site Your OpenBook, devoted exclusively to this type of personal, public status update.
In its announcement on Tuesday of the new social search features, described by the company as "Search, Plus Your World," Google focused on new things its search users will be able to do when signed into their Google accounts: find Google+ posts and Picasa Web photos they and their contacts on those social media sites have shared not only publicly on the Web but also privately with each other.
This new functionality builds on the existing Google social search features, which let users logged into their Google Accounts see links in search results that their specific social media contacts tagged with the Google +1 button or shared publicly using a social media service.
Google didn't respond to a request for comment about the controversy surrounding the new social search functionality.
Juan Carlos Perez covers search, social media, online advertising, e-commerce, web application development, enterprise cloud collaboration suites and general technology breaking news for The IDG News Service. Follow Juan on Twitter at @JuanCPerezIDG.