I'm considering this new theory, (of a rapid sinking), in light of the
recollections of survivors
viewing the sinking from nearby lifeboats. I seem to recall a number of
accounts that support the long, slow, agonizing submersion and then the
final upending and ultimate sinking. However, I'll bet that any sense
of time gets distorted in a terrifying situation and
maybe some of the survivors who reported a longer time required to sink
were merely reporting general impressions, or confirming times
suggested by somebody else.