I think he meant most judo guys have better internal skills then most "internal" people. I agree with him.
Course, that also depends on your standard of an "internal" guy. The people running around walking the circle, standing the san-ti that can't even hold their own against another grappler don't count
The "internal hippies" don't register in my book.
A majority of the Judo guys I know use waaay too much pushin' and pullin' with their backs (Olympic Judo looks like "#$t if you ask me). OTOH I rolled with Aaron Field's Judo group and a couple of his guys were top notch as far as posture goes. Could they manipulate their movement internally? Not really, but they had basic frame/internal posture down. And that in itself makes them harder to throw.
So again, it comes back to the quality of instruction. As far as Modern Judo goes, I think finding the right instructor that would give you a good base for this stuff are far and few between.
If they weren't you'd see a lot more Mifune's running around