The conjecture that Mr Wright slept until the end is only a speculation. Otherwise, I, personally, think he would have well awoke by the noise of many outside the hallway, the running water (which would therefore suggest his, indeed, having slept late, and also would suggest he woke up a little too late), and some of his friends could have come to warn him to go to the Boat Deck. The speculation just seems somewhat unrealistic in its own right, and illogical.
