Citations suggesting men are over-represented at the low end of the IQ / social success spectrum.

Prison Population (2010) http://bjs.gov/content/pub/pdf/p10.pdf Male 1,445,628 Female 104,629

Homeless (2011) http://homeless.samhsa.gov/ResourceFiles/hrc_factsheet.pdf 62% were male 38% were female

Mental retardation higher among males than females (2006) http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5501a1.htm

IQ test scores of males consistently have larger variance than of females (1995) http://www.ncbi.nlm.nih.gov/pubmed/7604277

Boys are over-represented at the low and high extremes of cognitive ability http://web.archive.org/web/20120211085904/http://www.psych.umn.edu/courses/spring06/mcguem/psy8935/readings/deary2003.pdf

Counter-claims and only-partially confirming claims can be found here: http://en.wikipedia.org/wiki/Sex_differences_in_human_psychology

You should also give this blog post a read:

http://scienceblogs.com/notrocketscience/2009/06/01/gender-gap-in-maths-driven-by-social-factors-not-biological/

It summarizes recent research suggesting that the gap between boys and girls in math performance is largely cultural. This isn't about IQ, but is closely related.

You'll want to search for things like 'male variance' or look at Baumeister's Is There Anything Good About Men?.