I find just the opposite.
I played several 00, 000, and "OM" (Martin's way of saying it) guitars last year, and all of them had this incredible THUMP in the bass (especially the Martins).
I used to have a big goofy jumbo acoustic, and it was loud and full, but not with much bass focus at all.
My current ride is a Guild dreadnought, and it's middle of the road.
But I found, in my experience, that the 000 style guitars have a LOT of low end focus.
This is exactly the opposite of what I have read both here and everywhere else, but hey,
