Hard to answer. What is a "hunch", what is "upright"?

I think in terms of the angle of your torso vs horizontal. Bolt upright would be 90 degrees. Max aero flat back is 0 degrees.

On the hoods I'm 45 degrees, in the drops I'm 30 degrees, with a slight bend in the elbow. And that's how I usually ride, in one of those positions.