Well, these guys don't drop monuments and don't otherwise seem to have a servant tag in any way, so it would look like they're just cardboard cutouts of heroic spirits created as a part of the farce.
But chapter description says that 'servants keep being summoned to fight each other', so who knows. Maybe they really are the mythical Average Servant that actually dies to Gae Bolg, actually can't get past God Hand, and simultaneously somehow actually beats Kojiro in a fight.