Look down at the numpad on your keyboard.  See how close the "3" is to the "6"?  ZOMG!!! it's right next to it!  I think you should consider the possibility that Mr. Edwards simply fat fingered the number in his haste to reply (which he did during his business hours BTW).

But since the 30 vs 60 error has absolutely no effect on the validity of his volatility argument, feel free to point to any spelling/gramatical/punctuation errors in the rest of his post as evidence that he doesn't think rationally.