M3 single versus double stroke, objectively

[Merkin]

Some Leica Folks believe the double stroke M3 was the best Leica ever made. But any M3 is pretty good and you can always multi-stroke an M, so unless you happen to find that perfect M3 double I'd go with ease of use and get the newer single version.

is it true of all cameras that you can safely double stroke the cocking lever? for some reason, I was thinking it was bad to do so with my old pentax.