If I might ask another question, do you know anything abut how they do the course rating and slope computations for the course? Have they come up with their own methodology or do they use the USGA process? It seems to me that even if the algorithm for computing the handicap were to be the same, if the CR and slopes are determined using a different process than the USGA process there would still be the potential for a systematic difference in the handicaps.
EGA uses USGA course rating practices so the CR and slope are comparable.
For interest EGA HC manual gives following conversions,:
CONGU -> EGA, (124 is approximate average slope of CONGU courses, i.e. end result is only an approximation)
USGA -> EGA (same rating system)
So UK person playing in US should multiply his HCI by 0.91 and then calculate playing handicap (course handicap).
For a higher handicap player, this means he can shoot 46 Stableford points on a good day and have his handicap drop by 0.5*10 = 5 points. Two of those rounds, and he'll go from 36 to 26. The following 5 rounds can be in the 20's and his handicap goes up 0.5 total.
I find the US system of the average of the 10 of your last 20 far better. That way, your handicap is based on averages and includes 20 rounds. Here, you can have on exceptionally great round that drops your handicap. I've played with many in the 20's handicap that struggle with it. They shoot 2-3 good rounds and drop significantly in handicap. Then they get their bad and regular rounds, and struggle shooting 36 for months. It also takes a while to get the handicap back up, since it only goes up by 0.1 each round.
To my understanding Norway uses EGA like rest of the continental Europe. I understand that the rise of HC is bit slow, but you are not supposed to be shooting 36 points (i.e. to your handiacp) every round. Only every 1/4 or 1/5 rounds.
And your example of 36 handicap shooting 46 twice (roughly 10 under each round), displays either exceptional potential or something iffy. And the HC system reacts quite well to that.
Bigger problem is CBA (in competitions) and it's implementation. At the moment it may cause unnecessary adjustments in HC based on daily scoring conditions.