Some Short of a Quandry

My friend and I have been debating something for quite some time...

Our exchanges always end up the same way- my friend calls me short. I respond by telling him that I am not short, but actually am the national average for height (which is true). His reply is always "yea, national average for female midgets"...

...I get what he's saying, but Im a little shaky on the correctness of it. I ask: are female midgets really shorter than male midgets? And is there really a recorded national average for female midgets?

-Dave