of course it depends on the mix. i thought everyone was clear on this already...bass is contained in both the five main channels, and the lfe channel. The amount of content that is in the lfe channel is up to the engineer that does the mix for that particular movie.

if you set your speakers to small and play an ES track, you're going to get bass output. You'll get all the bass in the main channels below your crossover point, but you'll be missing the lfe bass. IF you compare this output to non-es DTS track with an SPL meter, you're going to notice a reduced output in the ES track. It's not that the bass is being played at a lower output level, it's that you are simply missing a good portion of the actual bass content.