Did Google+ Copy Diaspora or Vice Versa?

May 2010: Googler Paul Adams was writing a book called Social Circles. http://www.thinkoutsidein.com/blog/2010/05/book-update-cover... (Google supposedly later blocked publication of the book: http://www.thinkoutsidein.com/blog/2011/07/why-i-left-google... )

June 2010: Paul Adams (that guy again!) gave a talk on "Designing for the Real Life Social Network" at Voices That Matter: http://webdesign2010.crowdvine.com/talks/10505