There is some evidence that there may have been a tiny radiation release prior to the tsunami arriving... and there are unsubstantiated claims that some anonymous worker saw a cracked pipe (that he couldn't identify).
That's a long way from saying that the plant was on it's way to melting down even if the tsunami hadn't arrived. He was in the turbine room, and the pipes that he could have seen there wouldn't have anything to do with emergency cooling. He also makes some comments that make clear that (if he exists at all) he doesn't know what he's talking about:
I also saw that part of the wall of the turbine building for reactor one had come away. That crack might have affected the reactor.
Well... no. The wall of the turbine building is entirely unrelated to the walls of the reactors themselves. It's almost as silly as the hyperventilating that went on when a crack was found within the North Anna containment! (GASP!!!)... which of course turned out to be nothing at all.
Maybe local geological factors made the quake worse. (See nearby Sendai Dam failure)
I'm not just guessing that closer must meen larger... I'm talking about the actual readings at the reactors themselves. Fukushima simply didn't exceed the design basis except in one axis by the tiniest amount.