I don't/can't/won't do maths but the article shows clearly the 3 main scenarios where dynamic rollover can occur. It is, as you say, usually insufficient or incorrect cyclic input that allows the roll to start in the first place and looking ahead at the disc and horizon is the best way to see any tendency to roll developing. Those who like to take-off staring at the '2 o'clock daisy' won't notice the roll and are more likely to incorrectly position the cyclic in the first place.
Once it starts to go, it is the collective that determines the rate of roll, especially in a teetering head helo where you have very little control power - hence the corrective treatment is to lower the lever fully.