This is a professionally interesting discussion, though also a bit of a rabbit warren (when I want to avoid getting into it, when people ask me about scoring, my stock reply is that, being British, I score out of 20 and then simply multiply by five).
In the Médoc, where the existing hierarchy is the ranking of producers (not terroirs) in 1855, the 100-point system is somewhat egalitarian, in that it cuts through the 1855 system and a 5th growth can come out on top of a 1st growth.
In Burgundy, however, where there is also an even more entrenched hierarchy of terroirs, the practical tendency of the system is to reinforce that hierarchy, with only the top sites ever having a shot at the highest numbers. Jasper’s idea of awarding stars is one solution to this problem, which he and I have discussed and I think find equally frustrating; yet is not 89/100 and 5 stars for a Bourgogne rouge tantamount to saying “I would score this higher if it were not a regional wine”? My preferred solution would be simply to score said Bourgogne rouge a point higher; yet it’s true that the 100-point scale is so compressed today that there are not many points to play with if one wishes to express such nuances.
Difficulties notwithstanding, as I’ve observed, one of this strong existing hierarchy is that scores for Burgundy are generally quite conservative. And that systemic tendency may have been amplified by the fact that people such as Allen Meadows, Tanzer, John Gilman and other respected and prolific voices on Burgundy also happen to be generally quite conservative scorers. Indeed, Allen at least has taken philosophical issue with the notion of ever awarding 100/100. Burgundy had also long been reviewed very conservatively by TWA, and indeed I was recently accused of being unduly generous by giving 100-point scores to two older vintages of Coche-Dury Corton-Charlemagne.
Clearly scoring has to be contextual: in what sense can a fino sherry be rated on the same scale as a Beaujolais? But it’s an open, or at least undefined, question as to quite how contextual it should be. Should Burgundy be scored as a region, including the Beaujolais? As the Côte de Nuits, Côte de Beaune, Côte Chalonnaise etc? By commune? Or by level in the appellation hierarchy? I think most critics’ implicit answers to this question are intuitive rather than defined, but fortunately I think most consumers intuitively understand them, and they are looking for different things in a 90-point Monthélie than in a 90-point Vosne-Romanée.