This is just a theory.
I am thinking that the reason this type of torqueing works is because it is affecting the barrel harmonics. If you think about it, when the action is locked onto the barrel, it essentially becomes one. There are many things that can affect harmonics. How tight you hold the stock, where the stock, sits on the rest, and many more i am not mentioning. So I definitely think it is worth trying if your groups are not getting any tighter. Like the article on 6br.com said " you have to have a decent group before you even start to try this ".
Nothing to loose :)