Iron Tail miss math

A miss is worth 1/3 (33.3%) of a turn. So if an average turn is 6 seconds, using Iron Tail to OHKO is 2 seconds slower than using a 100% accuracy move to OHKO. This applies even when misses can lead to heals (e.g. Confuse Ray), so long as you average the turns correctly. It does not apply when misses can cause a 100% move to hit on the next turn (e.g. Curse).