One problem with discussing IVRS and recovery techniques is that the incipient stage is very variable and not binary - you can go from having the right figures on the dials to believe you are at the onset of IVRS, where pretty much any recovery works, to being much deeper into the void where application of power takes you from IVRS to VRS very quickly (as Hughes 500 alludes to).
The Vuichard 'technique' works at the very early stage simply because doing pretty much anything would remove you from the parameters of IVRS - he has just made a song and dance out of it.