The fact is that nowadays all coaches in all of the top union nations will have had some exposure to League skills, be that simply by studying League, or by being involved with other union teams that have had League input. Although the AlI Blacks don't have a League coach, I am sure that their union coaches wrung every ounce of information they could from Brad Thorn on how League did things.
I am also pretty positive that they will have attended League training sessions. I remember as far back as the eighties that Hull KR (and possibly many more Leage clubs) opened their training sessions to union coaches. Of course, this was pre-honest professionalism so was not widely publicised because, as we know, League was the devil back then (probably still is) and the reptiles that played it only did so for the money - they had no love or affinity for the actual sport itself, unlike their union counterparts who only played the game for its Corinthian values.
Haha, love the reference to reptiles, good old Dani Craven.