Popularity and clique mentality tends to be much more of an issue in female circles than with males. I would say that, if one were to assume either sex will get untold amounts of hell for dabbling in tech early on, a female will probably get it worse.

You also have to note that culturally, there is the "nerd" phenomenon backing guys being interested in tech. If a young woman decides to get into tech, she doesn't get the same label as a guy does, she's often labeled by her peers (which can be fairly brutal) as a loser, outcast, or just "not one of the girls".

Now, given that last point, take a female developer who's young and just trying to get into things: you'll never quite be "one of the guys", and by choosing this vocation you're throwing up a flag that states you're fine to never be "one of the girls". That's not a fun combination to go through your youth with.