Like Bev says, I would not call it hyper, but if by that she is stating that females have a harder time settling down, I think it has nothing to do with what sex the dog happens to be, it is more in the breeding. I have two females. Both I would say are very enegetic, but one one has a much harder time settling down and she can pace. I cannot tell you how many times she has made circles around my dining room table.
Both personalties have their good points and their drawbacks. The older GSP you can reptatively work her and she will continue on. She is very forgiving if I have made a mistake in training. She has alot of drive, but can be harder to control at times. She can sometimes be a challenge in the house to settle down. We have worked around this by letting her pace around the dining room table, no running through the house or jumping on and off furniture. So I guess your breeder would probably label her as hyper.
My other GSP does not do well on reptitions, so you have to be more on point with her training. In other words, I really have to think about how to get the behavior I want, no mistakes on my part. She picks it up quickly and still has drive, but I find she is much easier to control. Some of this may be because she is my second GSP, but she definitely has a different personality. In the house, she settles quickly and is really very much the snuggler.
The funny thing is you would think the one that has a harder time settling down would hate the crate, but that is not true. My older GSP has always been a dream in the crate, the younger one has taken alot more time to finally get to the point she is not trying to escape from her crate.
So both female GSPs, different breedings. I really love both of them for what they are. Both GSPs can make us laugh with their different antics. So from my experience no, I don't think it has anything to do with gender, just genetics.