There is no mention of pay in this article, but there are plenty of other sources that dispel the myth that women get paid less than men (it's more like people of lower confidence simply do not ask for as much money -- both men and women; see The Confidence Gap).
I also think part of the reason we see fewer women in Tech is they don't want shitty jobs. We have everything from Dilbert to Office Space to We The Robots, all showing how terrible life in a cube can be. Women often take jobs that pay less but are more fulfilling (teachers, nurses, non-profits).
If we want more women in tech, I think we'd need to make tech more fulfilling and less miserable for everyone.