Taco Cowboy's experience allegedly happened on 2011-04-11 at 16:07 SGT. The big quake happened on 2011-03-11 at 14:46 JST, which is 13:46 SGT. So neither the date nor the time of the story checks out. If his memory of those particular details is so sketchy, then all his other memories of the experience are suspect -- perhaps whatever caused the hallucinations also disrupted his time sense, or perhaps the entire memory is false. (I'm not suggesting that the story is fictitious, just that it's based on an unreliable memory.)
Even ignoring the date/time errors in the story, we don't really see any evidence of spooky premonition. There had been a magnitude 7.2 quake two days earlier, which probably had a lot of people thinking randomly about earthquakes just before the big one hit.