Women read fantasy all the time. An entire imprint (Luna) was launched to capitalize on the fantasy/romance cross genre. I'd even say Urban fantasy exists primarily due to women readers.
As for the YA...
When I do school visits and books signings, half the people who bring me books are boys. The Shifter is for the MG market, so middle school boys are reading girl protags in fantasy, no doubt about it. Boys asks a lot of questions about the book, and they sit right up in the front row.
I was at a panel for a popular Canadian author several years back (I forget who) who wrote for boys. He said that boys will read girl characters, as long as there was a strong male figure they could also relate to in the story. (I have one, so this holds true for my book). They also prefer more action and a faster pace, especially at the beginning.
And here's another interesting thing I've had several middle school media directors tell me. If a book is getting a lot of attention, like Twilight, from the girls, the boys will ask for it to see what all the fuss is about. And many of them are getting just as hooked and asking for the rest. Love it or hate it, Twilight isn't something you'd associate with middle school boys, but they're reading that too.