1. Assuming Montejay is not trying to pull our leg and this is not a joke, we have to take the difference he heard at face value.
2. The question then is what caused the difference in sound he heard.
3. IMO: Montejay is assuming that SHM-SACD burn-in caused the difference he heard. Personally, I find this explanation implausible because we would have heard of this phenomenon before if it was relatively common. The fact is, as far as I can tell, none of us here have heard of SHM-SACD burn-in before.
4. Then we are left with speculating on other possible causes.
PS: SHM-SACDs are relatively new so probably not that many in USA yet.
PSS: I have a number of SHM-CDs and have not noticed this situation with them.