Valid point on missing the small ones...although, I think his vid was done with the ROI concept of getting the big gold and avoiding all the scrap...a 2gr 14k in todays dollars is @$50 US....
Anyway, its a real conundrum for inland park hunters, based upon their territory etc...if the only place a guy can hunt is a few little modern parks close to home, yes, then dig it all...If a fellow is running and gunning a huge area with lots of parks and trying to make pay...you dont want to miss ANY big gold, and you dont want to be frittering away your limited time pulling tabs and shards either looking for it all....
I have not done the weight/value ratio regarding the heavy samples he found based upon the weight/value of the light samples he would miss...a cursory read tells me his method is valid for what he intended to prove...its probably a better ROI strategy than hunting all small gold..heck, a guy can bang out an equal amount of clad quickly and easily than hunting tiny gold in the dirt..a guy would need to find 20 2gr 14ks/yr to make what he can easily get sniping $1000 clad...so its a strategy based upon time and value which I can appreciate...(High value targets as opposed to ALL targets)...
I have struggled with this concept as I'm sure we all have...none of us wants to miss gold of any shape or size, but none of us wants to dig tabs and shards either...this presentation is a great representation of using the detector in a logical approach to dealing with our conundrum..

Like Petew's original inquiry...The thing that drives me nuts is the thought of missing chains! Rings are entirely different than chains..
All it takes is one big chain to make a year...unfortunately even the huge ones are going to be in tabs and foil, most likely they have seen a coil a time or two, were never heard, or never dug...
Mud