IMHO this is a mistaken opinion. The game is definitely faster due to the smaller map size and linearity. Essentially, it's a mix of SMKA and Jebus Cross. I haven't seen a single game lasting longer than 1.5 months. Often the game ends before the end of month 1. Although maybe that's still long. Maybe I'm overestimating the blitz timer.

The main advantage of Mini-Nosta is that it's easy to adjudicate. Take a look at the layout, and the outlook is clear. You estimate the time it will take for the runaway player to finish eating their treasure zone, estimate the amount of goodies his opponent will gather in that time, add them to the strength of armies/heroes, and compare.

Example - a Medium vs Redwhite game from the last CIS, which ended in adjudication by mutual consent on day 14, even though the prospects for playing were still 2-3 weeks, but they would only have delayed the inevitable.

But on 8mm6a such a calculation is impossible in most cases — too many possible movement routes for farmers, too many castles/villages, teleports, and the rest.

Playing 8mm6a on L+U is an lol-facepalm, I suggest not considering it :)