This came up on LW before (http://lesswrong.com/lw/73w/study_on_group_intelligence/); I pointed them (http://lesswrong.com/lw/73w/link_study_on_group_intelligence...) to a previous comment I had seen dissecting the study: http://hbr.org/2011/06/defend-your-research-what-makes-a-tea...

tl;dr: as one would expect, it's not that great and certainly doesn't justify the title.