How badly do you want to know? The real test would be to disconnect both brakes, switch them to the opposite lever and see what happens. Or you could disconnect the cables from the calipers and measure the cable pull some way. Either would give you a "for sure" answer that I can't provide. Honestly, if it were my bike, I'd either ride it the way that it is or swap on whatever brakes and/or levers that met my budget and see what happens.

I do know this for sure: In the past, due to economic necessity, I've built up and ridden some pretty marginal bikes from whatever I had on hand. One trick I remember doing was to clip off the quick release thingie from a Weinmann drop handlebar lever so the lever would open farther and increase the cable pull. What I don't remember is what kind of brake I was using. It might have been an Atom hub brake. The bottom line is that at least a few bicycle brakes have differing cable pull requirements but I can't say what all of them might be.

As long as we're on the topic, I might as well stir up the pot a little. I've also tried using V-brake levers with regular calipers. They met my standards. YMMV.