exactly. except for the Weiss Minerva, most of these so called "true 24/176 or 192 DACs" don't utilize digital connectors that are even capable of this high native sample rate (& none of these DACs mentioned hv dual AES/EBU, SPDIF, Toslink inputs), so how in the world are they "true 24/176 or 192 DACs"??
you might also wish to look into yr music s/ware's audio resolution. as far as i'm aware, not all s/ware will do 24 bit (e.g. iTunes, etc. will only do 16 bit max). this is not related to what bit rate you actually "lock" yr computer:DAC at... if yr music s/ware's unable to feed 24 bit data to yr computer, then yr computer will not be feeding 24 bit data to yr DAC.
anyway, with regards to the Weiss Minerva, i hv previously compared this DAC at 24/176 against Weiss Medea doing 24/88. downstream components consisted of Gryphon's top-of-the-line components & Gryphon Atlantis speakers. to me, Medea still sounded much better despite Minerva having a higher native sample rate. guess specs may not always tell the whole picture?!