PS. there's absolutely sourcing for those ROI numbers. Here are a few of the sources for the studies linked to directly below the ROI metrics (Anita Borg Institute), and pages 11-12 of that report detail all of the sources and studies. Here it is, in case you missed it on the site ---> http://anitaborg.org/wp-content/uploads/2014/03/The-Case-for...
Those metrics are based on studies by: Cristian Dezsö at the University of Maryland, and David Ross at Columbia University Business School; Cedric Herring, Professor of Sociology and Public Policy at the University of Illinois at Chicago; Cindy Padnos, founder of Illuminate Ventures, who compiled data from 100 studies on gender and tech entrepreneurship; The London Business School report, Innovative Potential: Men and Women in Teams; the September 2013 research report, Innovation, Diversity and Market Growth by The Center for Talent Innovation (CTI); Professor Anita Woolley, an economist at Carnegie Mellon; Cumulative Gallup Workplace Studies; and McKinsey & Company's annual series "Women Matter."
Those metrics are based on studies by: Cristian Dezsö at the University of Maryland, and David Ross at Columbia University Business School; Cedric Herring, Professor of Sociology and Public Policy at the University of Illinois at Chicago; Cindy Padnos, founder of Illuminate Ventures, who compiled data from 100 studies on gender and tech entrepreneurship; The London Business School report, Innovative Potential: Men and Women in Teams; the September 2013 research report, Innovation, Diversity and Market Growth by The Center for Talent Innovation (CTI); Professor Anita Woolley, an economist at Carnegie Mellon; Cumulative Gallup Workplace Studies; and McKinsey & Company's annual series "Women Matter."