Larry;
I bought my first double in 1954 (55 yrs ago) & have used a single very little since. While I would have to agree with you in principle, I will also have to say, human nature being as it is, one is just as apt, if not more so, to have a cripple down with an empty gun with a gun holding more than one shell as they are with a single. While I have no statistics, it would not surprise me at all to find that the more shells a gun holds the higher the odds of this occuring would be. I have known hunters who did use a single who carried another shell between two fingers of their forward hand & could execute a very rapid reload. This would however likely delay one just enough to make them aware of a cripple needing attention, more-so than if that next shot were immediately available upon seeing feathers fly & bird "Start" toward the ground. I am not planning upon taking up a single nor on a crusade to get others to do so. If for whatever reason though were compelled to do so, I would not see it as big of a handicap as many would.