hardware & software
Computers and electronics seem to have a mind of their own.
When I was using the PS3 + HK receiver, I thought that I could tell the difference between DD & TrueHD.
But then with the Denon AVR5308 + DVD3800BD, I thought that I could NOT tell the difference.
And now with my HTPC, I believe I can tell the difference. TrueHD just sounds "more dynamic" with "more bass" and "more surround effects". I don't know. Maybe on my HTPC + Asus Xonar, the TrueHD just sounds LOUDER?
For example, on "Sex & The City" BD, when I switched from DD to TrueHD, the sound just seems louder and just "MORE".
Maybe that's why a lot of people seem to "differ" on opinions. It's not just the TrueHD vs DD; it's also the actual HARDWARE/SOFTWARE being used.