I think perhaps he's more referring to the differences between DD and DTS, though I could be wrong. Personally my receiver offers the option to have DTS tracks automatically boosted another 10 db. So my setting is -5(out of -10) for Dolby Digital, and by default my DTS tracks are of +5.

So apparently it's a known factor that DTS tracks run quieter in the bass, for whatever reason...

"We're on the island of Misfit Toys"