Oh these green triangles...
From your pic, I'd expect a reasonable upslope - 2-4 ft extra power.
More difficult if it shows the arrow down with "0 in". It may still mean some upslope, so a 6" putt may stop short. Thus, still 2 ft extra power.
Truth is told by the grid IMHO. If it shows red behind the avatar and black or blue behind the hole it's unlikely that "0 in down" will be true.
BPB 11 + 13 are good examples!