I think both sexes have the potential to hit 20ft + under the right circumstances. I'd just assume that's going to be the case with either sex unless you get one with a really high percentage of d/sd. The only noticeable difference in behavior between my male and female is that out of the cage my male tends to "run" a lot for 5-10 minutes then he'll slow down whereas my female just kind of meanders about. I may have been lucky but neither of mine have ever shown the slightest bit of agression or defensiveness.