3mm on the front pads doesn't seem unreasonable for a non-hybrid. But it still seems like a lot of wear for a car with regen braking. Perhaps Kia doesn't use pads with the same life span as a "normal" car, so they can argue that "all cars need brakes by 80,000 miles". Not a true statement, of course, but a way to generate revenue for their dealers. Since I have gone 60-80,000 miles without a problem, and I live on a steep hill requiring steady braking as soon as I leave my driveway, I am tending to pads that just don't last as long.
EDIT: I just remembered you're in Canada, so I assume you meant you're coming up on 80,000 kms. That's just under 50,000 miles, and that's still not what I would consider acceptable, unless you live on a hill like I do.