Yes, I think DTM means from transplant outside.
DTM really is only a general reference. Weather varies too much, as does soil, nutrients, etc, and these things will all affect the seedlings/plants. I use the DTM only as a general guide: I get fruit earlier from shorter DTM types. The longer DTM types won't ripen for weeks after that. Using a few early, mid, and late season ones gives a better supply of fruit for a longer time.
Karen