Not all, but more so than other conspiracy crowds. You have more of a chance getting reasonable discourse with them, I'll admit.
I've been trying to think of a reason why somebody would argue for the switch-a-roo to happen and the only thing I can think of is somebody playing games and seeing if they can convince people of anything.
The general consensus amongst that crowd is basically the Olympic was so badly damaged when HMS Hawke rammed her, White Star cooked up a scheme to switch the ships and scuttle the Olympic (portraying Titanic) and collect the insurance money. The details vary wildly, I.E. it was part of a grand scheme that led to the creation of the Federal Reserve, JP Morgan bumped off his competition, etc., etc.
Crazy thing is there is physical evidence we can see and touch. Of all the CT's, the one to me requires more suspension of disbelief than most others.