The supreme ethics argument has been used in these and similar discussions in Norway for decades, not only in sports but also business related where finance scandals and fraudulent behaviour seen in southern parts of Europe "could never have happened in Norway" kind of attitude. This is a fading perception on the economic arena (even though we're on the better part of transparency rankings), but the idea still has a strong standing in the public when its about sports and especially winter endurance sports.
There have been several attempts to dig into what really happened in XC-skiing, Speed skating and biathlon in the 90', but so far there has been little success. Investigations have mostly been done by journalists, most notably norwegian and sweedish journalists, but they haven't been met with cooperation, transparency and full disclosure from sports associations, key representatives and former star atheletes as one would expect given this alleged culture in scandinavian countries.
Representatives from antidoping athorities in Norway have also red-flagged to norwegian sports association several blood-samples taken on norwegian atheletes from some years back where science can proove there is doping involved but where nescessary legislation to take further legal action is not in place. This representative quit his job, wrote a book where he basically calls the antidoping regime noneffective and that anyone can beat the system. Who these atheletes are is of course not disclosed. These things are debatted in norwegian media, but there is not much pressure on it.
A few years back there were sweedish journalists digging into unusual HB levels on XC-skiers in the 90'. They where promised full disclosure on all measured values from the norwegian ski federation but where only given nubers taken off-season, as if that would be sufficient to prove the atheletes where clean. The reason given behind this was that the norwegian ski federation did not have any samples of the HB-values on season as FIS was taking their samples so we didn't need to. What these values are and where they are is not given to the public. FIS has also in this particular aera "privatised" testing operations, labs and so on and has got full control of the whole chain, very few question the obvious issue of independancy. Journalists who ask unpleasant questions do not receive access to the atheletes, interviews etc. A whole TV-show with our greatest sports stars was cancelled due to a critical piece on TV2 (the program and what they found was nonsense, but nevertheless it illustrates the general attitude).
This winter the norwegian XC-skiers have dominated to such extent that many question what will happen in the future if other nations don't catch up. Especially the russians and finnish are not performing according to standards 10-15 years ago, and a former female well known athelete said on TV that one of the reasons for this is that these countries don't know how to train without doping, whereas norwegians have developed scientific and superior competencies on endurance training without doping and so on....so naturally we would prevail when the antidoping measures take effect
There are many many other cases with strange references to why things would not happen here etc, many doubt what was going on in the 90' but like footballers are gods in Spain, it seems as if XC-skiers are gods and untouchable in Norway.
So yes, in my opinion there was really something strange going on on several levels in Norway but we don't know what, where and how.