Can't say, this particular DTS-HD stream is being reported as 48/16. Checking around the net, that seems to be correct for this title. But it would certainly be very important to me to retain 24-bit with discs that offer it.
I don't have any other ripped Blu-rays to try, but makemkv is reporting Harmy's latest SW 2.5 & ESB 20. mkvs to also have 48/16 DTS-HD streams. Is that correct?