I don´t think i am comparing oranges with apples here. In the first two cases the thickness of the donor hair is medium, the donor density is at 80 FUs/cm not so great. In the first case from 4766 grafts 225 were singles, in the second case from 3070 grafts 158 were singles. In the case from OP from 5762 grafts around 430 grafts were singles, the rest were doubles and mainly multiple grafts which is a great amound of multis in order to achieve great density.
They used beard hair too but as the moderator said in the previous post this is really thick hair and it provides great coverage on the midscalp mixed with scalp hair always.
Comparing with the last case, the hairline in the case of the OP is preety conservative and high in my opinion too, which is right were it should be. This result was achieved with 3288 grafts, almost half the grafts that HLC has used in this case.
If you read the report from OPs thread the density they have implanted the grafts is at 50 FU/cm on the hairline and 40 FU/cm on the midscalp, there is no difference to the density between the midscalp and the lateral humps that you are referring. The difference is in the growth rate, which in my opinion is preety low in the whole area.