Where are you saying they started? The one to the lefty wound up about 6 inches off the plate, which means to break 18 inches, it would have started on the outer half, which I don't see. The one to the righty might have gotten a foot off the plate, but again, that would mean it had to start almost in the middle to break 18 inches. Typically you throw the cutter on the inner half/corner and want it to break in off the plate after the batter has already started to swing.
A quick search of some write-ups suggests his average cutter breaks about 5 inches.