On one hand, looking at this guys previous predictions, specifically his forecast page, I'm underwhelmed. Lots of the faults in the US southwest and west are statistically overdue. So make a prediction, pretty much any vaguely worded prediction, and there is some chance it will be 'true' if you squint your eyes enough.

On the other hand, just because someone makes a prediction based on smoke doesn't mean an earthquake isn't going to happen some time soon. IMO a certain level of watchful alertness and well rounded preparedness will prove helpful either way. No matter what does or doesn't happen.