Would you drink that milk?

I was eating some yogurt and reading the side of it a while ago, and there on the front of the container it says:

From Cows Not Treated with the Growth Hormone rbST*

Now... Is it just me? Or is there something a wee bit unsettling in the fact that they have to specify (in big lettering) that the cows they got their milk from were *not* treated with growth hormone?

The little asterisk leads you to the following disclaimer on the back of the carton...

* According to the FDA, no significant difference has been shown between milk derived from rbST treated and non-rbST treated cows.

Umm... yeah... excuse me? What exactly is no 'significant' difference? Or better question, what exactly is an insignificant difference? This all brings to mind that old cartoon for the cow pox vaccines, you remember that one? People with cows growing out of them all over the place... this one...

So, could someone please define again, if you would, what they consider 'significant' differences in the milk to be? I mean, really, what sort of warning signs should we be looking for when we're drinking milk?