>No.  Like you I only have the Beowolf Cooper statement.  Probably time some work was done on this. 

I am not in disagreement with you re. the merits of Amm as we are both enthusiasts of that subspecies and it is also the only honeybee native to the British Isles
However, I currently include that claim about Amm living longer than other subspecies in a presentation I do titled 'myths in beekeeping' which also includes the oft repeated myth about aggressive bees gathering more honey.
Beo Cooper is the source of most of the myths and folklore surrounding Amm and there is little or no science in any of his work.
When his work is queried the typical response it that he was an entomologist and knew what he was doing - as if that merits a bye ball re his claims about Amm. Beo Cooper had an agenda to promote Amm, same as Brother Adam had an agenda to promote his own Buckfast creation.
He was an observer of bees who wrote about his observations, just like Brother Adam, no more no less. None of his work set out to critically test theories in a manner which properly controlled the variables.
Time to move on from his claims imho.

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