Hello Michael,
I think this topic was raised before in a different Shipwreck Topic Thread. The Empress Of Ireland Thread perhaps because I remember asking in my youthful naivete or somebody else asking why there were remains on the Empress and not on Titanic and you giving the same answer or Jason Tiller giving the answer you gave now. I definitely remember it though. It is a good topic for discussion though. I believe in one of the Dr. Charles Pellegrino threads there was talk of remains of a Chicken being found on Titanic but I never checked back to see how that was resolved.