I've seen this discussed as well. Having different types of training for women, or longer training to get them to the same physical standard as men.
I wouldn't exactly be against the idea of doubling the training for women to get them to meet the same requirements as men. If the current training isn't enough, then give them extra training, but keep the same standards. This would however, prolong their training, and they wouldn't be able to be deployed for much longer than men.