Originally Posted by
ForkTailedDrKiller
Would be interesting to see some stats on engines that have failed to restart after the mixture was used in an EFATO drill - with the engine to being returned to zero trust immediately after the 15-20 secs to complete or stuff up the drill, not left shut down with or without the prop feathered.
Seems to me that when you hear or read about an EFATO drill that has gone bad there is likely to me more to it than just using the mixture to briefly shut down thrust from the engine.
Dr 
I agree with your last sentence.
I have no idea how many engine failures I have initiated as an instructor but it would be in the 1000's. They have been initiated both by closing the throttle and by mixture cuts. The only method that has ever caused me to wonder if the engine is going to come back to normal power have been those initiated by closing the throttle.