Rushforth, I fear this is not a sensible use of time. The word "immediate" or "immediately" appears 52 times in the LoTG, and it means different things each time. It's a judgement call in the context of the game and the situation occurring in the game. The tackler in international rugby must move away quicker than the tackler in vets' rugby - but both must act immediately. In law 20.3(h), the referee is required to whistle "immediately" a scrum collapses. Can we take this to set the time limit for Law 20? In law 20.4(e), when a scrum remains static and the ball does not emerge immediately, a further scrum is ordered. So - the ball is fed into a static scrum (I know, I know - but work with me on this!); at that point the scrum starts. If the drive from each side is equal, the scrum will remain static. Using the 20.3 reference point for immediacy, we don't allow time for a hook and channel - that would not be immediate.
The poll, I regret, will prove nothing.