1: http://www.forbes.com/forbes/2009/0316/072_terminated_women.... 2: http://folk.uio.no/olegmo/Men%20in%20Nursing/Evans%20J%20199...
My own personal theory, which is completely unsupported by anything other than my own experience and bias, is that it is a particular manifestation of the 'white knight' behavior that is so common among my peers.
Again, I am not saying that it is not a real issue, or that it is not worth discussing. I'm just pointing out that the tech industry has an unusual level of fixation on this issue.
At the heart of this gender dynamic is the need to separate the masculine from the lesser valued feminine. Male nurses do this by employing strategies that allow them to distance themselves from female colleagues and the quintessential feminine image of nursing itself, as a prerequisite to elevating their own prestige and power.
Now spin that into computer science and female and post it here. The fire will reach sky-high.