We can only speculate as to how many people were still deep inside the ship. Survivor Frank Prentice said some of the passengers would not leave their cabins.I bought Jack Grimm's book back in 81 and even at the age of nine I thought that this object was not a rock. As we can clearly see in the above photo, one of the blades is missing. However, I do have couple of questions--how would the impact with the iceberg cause one of these blades to fall off ,secondly, how do we know how many people were trapped in the ship? I've got a feeling there were a lot more than 100. I tend to agree with Aaron, that if Grimm's discovery was legit, he would have shared credit for Titanic's discovery,and Ballard's star would not shine as brightly as it has.
3rd class Steward John Hart was ordered to escort the passengers to the boat deck. He said:
"Those that were willing to go to the boat deck were shown the way. Some were not willing to go to the boat deck, and stayed behind. Some of them went to the boat deck, and found it rather cold, and saw the boats being lowered away, and thought themselves more secure on the ship, and consequently returned to their cabin. I heard two or three say they preferred to remain on the ship than be tossed about on the water like a cockle shell."
(He also handed out life jackets to the 3rd class passengers.)
"Some refused to put them on. They said they saw no occasion for putting them on. They did not believe the ship was hurt in any way."
Regarding to the lost propeller blade. The Olympic lost a blade '3' times in 1912 alone. Passengers who were on the Olympic described the same sensation as those on the Titanic. There were also Titanic survivors who were on the Olympic when she lost her blade and believed the same thing happened to the Titanic.
Here is a video I made about the lost blade and what the survivors believed happened.
Skip to 1.45