I've found that trout like this sort of thing as well. I've never done it on purpose, but I have caught fish on flies that have had wind knots located over/on the head of the fly that creates the same effect.
Using knot shown in the diagram on purpose certainly is more artful, and implies a level of intended skill, but I didnt mind when my stimulator skated at a different angle as a result of the wind knot over and through the head and hackle, and trout decided that it was lunch time

It was a mess to un-do after since my accidental riffle hitch overlapped the hackle about 2mms down from the head of the fly, but this fish liked it and that's all I cared about.
When choosing or tying flies for this technique, I read somewhere that you should try to have enough steel between the head of the fly and the eye of the hook to tie the hitch, otherwise you may crowd the head too much, allowing the hitch to slide off the front, defeating your purpose by leaving a knot in your line; or the line may cut the head cement and destroy the fly.
Another thing worth experimenting with is which side of the fly to tie the knot.
I read someplace (FlyFusion I think) about how most people try to have the fly angled towards the far bank as it skates, so the knot is on the near side of the fly, making it pull away from you; but there was also discussion of the opposite, angling the fly towards you as it skates.