Wow, yes thats wrong...
In freefall there are 2 forces working on you... Weight and drag.
As you jump out the aeroplane your drag is zero (if you ignore forward speed), so you accelerate downwards. When you reach terminal velocity, your drag is equal to your weight (by definition) and you dont accellerate anymore.
Drag is dependant on body possition, surface area, "skin friction" (jump suit), speed, and density.
so if you add weights the drag at terminal will have to increase, and all other things equal, this will be done by increasing your speed (terminal velocity).
So if you have trouble falling, u have the options of changing body possition, jump suit, and weight...
on the otherhand I think the only doesnt change is the time taken to get to terminal (give or take a few split second)