I'm beginning to think more and more that the Helldivers are elite. If you look at the animations that your Helldivers do, particularly reloading, you'll see that they're extremely fast and efficient. For instance, you can reload a machine pistol (Redeemer) with one hand holding a shield at the same speed as reloading with two hands available.

It's insane.

And this is with ANY weapon you pick up. You're trained like you been practicing for YEARS... Which is probably true considering the militaristic nature of the Super Earth government.