Have things become worse or is Seattle different? I saw none of this behavior during my tenure at Microsoft (1996-2000). Admittedly I am a dude, though a lifelong feminist.
There was an interview with Sara Lacy(sp?) from Pando where she says that it changed when the founder demographic changed. Before, it was either nerds, or older, experienced people from Intel, Cisco etc. Now, the "bros" are starting companies.
She credits The Social Network with being a self-fulfilling prophecy.