it would be worth trying to get hold of Mr Sanfords quote which I can't recite as I heard it second hand, but I believe he was quoted saying that at cruise speed and collective pitch the R22 rpm has been demonstrated to remain within limitations following engine throttle-close for up to 7 seconds using solely aft-cyclic. Not a method I suggest teaching
but it illustrates the benefit of using aft-cyclic on entry...
Edit - I still find this very hard to believe and if this is vastly misguided information I apologise and would like to be corrected as I didn't hear it first hand and wouldn't like to spread rumour (or try it 
)...