There was twitter reports (and screen shots) taking responsibility of the Globe report.
http://jesterscourt.cc/2013/04/23/boston-marathon-bombing-just-a-hunch/
This is the original story with more info.
This Jester guy has some really, really good stuff, a must read for anyone interested in who Dzhokhar was connected with. http://www.freerepublic.com/focus/f-news/3011454/posts?page=11#11