I've seen a guy on irc who got 0 in 18. I once managed to get 3 from a single one(Using treecapatitator). The numbers are all over the place. Honestly, this is more about psychology and statistical distribution than anything else. The drop is rare, therefore the occurrence is rare, therefore anything you do or don't do when the occurrence happens is given a special significance - even though there is none. Most tree drops have a percentual chance per leaf block to drop, I've seen the code for both vMC and IC trees and there is no special casing, it's the same rate for decay, breaking by hand, or whatever. It's illogical to assume it's different for silverwoods. Therefore I ask you to stop these "It happened twice to me this way, so it has to be that way". Either do some serious testing in creative, or look at the code, but please, enough with the misinformation.