So I could not in the video see any noticeable wave. If there was that played a part, it would have had to be perpendicular to their path, since both boats flipped at exact same time.
I am wondering could both boats being side by side caused each other to flip from their aero wake?
Anybody know the precise location, looks like its off the shoreline of "The Pier House resort" at end of Duval street.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.