Indigenous Madagascar, contrary to mainland Africa, has mostly Asian and Arabic Mid-Eastern origins. So, the persistence of some non-sanguine tribes with A types might well be expected.
We noted -- contrary to most of mainland East Africa -- a high prevalence of trait A in Madagascar. With a broad brush, we painted the island as "Corybantic NA type", but some non-sanguine A types among them makes sense, especially in the light that the present-day indigenous population is described as 5 to 10 percent Muslim.
Did the short, stocky "A types" appear to be of lighter skin color?
Arrogant "A types" are the ones least likely to be amused when asked by tourists to "smile for the camera", so it must have been amusing.
A tendency to short stature in A types seems to be universal, although many other genes are known to affects stature. Thus, the NPA genes appear to modulate physical stature in some subpopulations and in some families -- but their effect on stature may be overwhelmed by other genes in other groups.