Although mine are not the most gregarious of cichlids, I wouldn't call them any more skittish than any other wild type.
They are by no means dog like, and not at all domestic like an oscar, and because they were sold as wild, I do not expect them to be so.
I have not had them out of a community setting, and I believe their temperament might be considered to be similar to their close cousin from the same area of S America, festae.
I have also "not" found them to be sensitive.
I did some research on the rivers they come from that flow toward the Pacific, and found their average temp to be on the cool side, (lower to mid 70sF) so have tried to keep temps down.
And have attempted to kept nitrates in the <5ppm range, and water chemistry stable by doing daily or every other day 20-30% water changes.