"There are several published studies about turning back to the airport that address stall speeds, altitude, and time factors."

Well, please do share them.

If you haven't read the published studies, I'd suggest you forget about the runway behind you if you have an engine failure on takeoff. Save yourself by shooting for the least harmful place in front of you to put the airplane.

If you have read the published studies, be sure to apply them as published in the same situation as they were published.

Can't go wrong with that.