the lineament that must be the fault projects a bit south of Petion-Ville:
18 deg 30' 49" 72 deg 17' 7". The fault is not well-defined geomorphically there and could have split up. If there is a ground rupture it is always possible it could be on some other fault strand.

I checked to make sure this image is indeed post-quake, because there was only a couple planes at the airport and few people in front (not the case now), and indeed you can see the collapses including the presidential palace.

This image does not extend far enough south and west to cover the well-defined fault.

But, it does cover petion Ville and a heavily built area on hillsides near:
18 deg 30' 40" 72 deg 17" 31" and I don't see collapses in this area but have not looked closely enough.

My guess is that the ground did not rupture there. We know that the earthquake propagated away from this area: it propagated to the west.

Chris