DC voltage and true RMS voltage are equivalent.
DC meters read the average, DC value of a wave.

No dispute on that, just why a DVM might not read it right.

Anyway, of the TRMS, I have noticed my average responding meter comes fairly close.

The TRMS one is a Fluke 8050A which I keep on the top shelf, it has more than enough accuracy and the LED display (which is in perfect shape HAHA) is not as easy to read as the 8000A I use as a daily driver. The 8000A has one less digit and is fast, I like it. When I need accurate then well... But then sometimes I read DC voltages with a scope. Put it on DC in most things you get like maybe 25 volts tops ? Five volts per division. Most **** you just need to know if it is there. I don't care from 4.96 or 5.03.

"Hack", say it.