Yura, your point of view is correct, but it's correct from the judge's perspective. And, statistically, mini-maps aren't any faster than standard maps. More precisely, the endgame on a standard map is unpredictable – it can start from week 2 and continue until the very end, while on a mini-map, it starts around week 3-4 and continues until the end...
On 8mm6a, you can easily play for 2 months and not even approximately determine the winner.
For tournament purposes, it's not the duration of the average game that matters, but the duration of a drawn-out game.