The history of 3-D movies coming out on DVD is limited and until Avatar, most 3-D movies were aimed at kids and kids movies tend to do better on DVD regardless (as they make great babysitters).
We'd guess that overall the latter outnumber the former, and we're fairly certain the latter tend to be more intense with respect to this aspect of their identity.
It's not the same feeling that you'd get from a traditional separate subwoofer: whereas floor-based box units normally found in other systems tend to rumble from the ground up, the Zeppelin Air's bass feels somewhat more directional, more a part of the overall mix.