Gender balance on social networking sites

Information is beautiful presents a visualization of gender balance on social networking sites.  I have to agree with the comments that it's a bad graph.  Heck a spreadsheet of the data conveys the results more clearly, which is that, overall, women account for about 52% of the traffic on social networking sites, and this is largely because of their dominant presence on facebook and twitter.  These, plus Pinterest, youtube, Google+, and badoo are the only sites of interest in terms of differences, the rest are just noise.  (this is me eyeballing the numbers; I could do some multiple comparisons tests with appropriate adjustments, but really, it's not necessary)