Hydroplaneing is nothing more than going too fast for conditions, period. If it is wet, you run big tires, and have a high center of gravity, you need to slow down.
This might piss you off, but in my opinion, it wasn't an accident, it was operator error. An accident is when something happens that was not reasonably under your control.
Its like around here when the first snow hits each year, we call it Darwin Day. All the Florida and California peeps get in accidents and complain that the car didn't stop like they told it to, so there must be something wrong with the car.