We should at least wait until there is a level playing field until we make such comparisons. At this point, it is too early to just jump to a conclusion based on the current situation. Of course I can't think of any extremely well trained females which are at the level of the extremely well trained males - but I think that might just be because those males started training a long time before any of the females. Until the generation of extremely well trained males with no female counterparts dies off, we just don't have the right information to draw the gender based conclusions being alluded to.
Emasculate aikido? I guess I just don't think that aikido had balls to castrate in the first place.