Yea that sounds about right... The easiest way I was able to understand and teach it was take a cessna at max weight, and then at say middle of the road weight.. At the speed that is ref. the pilot goes full back on the elevator. Visually think what the G's would be at the max gross weight at both speeds, and then what would it be like at the lighter weight. At the lighter weight to maintain altitude you must pitch up so as a by product you are closer to your critical angle of attack, vs if u stayed at the faster Va at the lighter weight which would put you at a higher angle to travel to your critical angle of attack and cause higher load factors that could cause structural damage.
Hope that helps