Privet blooming everywhere around my apiary — is the off-taste thing real or bee folklore?

Devon, fourth year, five hives. The farm hedges around my out-apiary are absolutely humming with privet bloom right now, and the bees are working it hard in the mornings alongside the last of the clover. An old boy at the association meeting sucked his teeth when I mentioned it and said privet honey is bitter, 'ruins a crop', and I should hope for rain. But when I search around, half the sources repeat that and half say nobody can point to an actual ruined harvest and it's one of those inherited warnings. My summer supers are maybe a third full. Realistically, with privet as one source among many for a few weeks, am I going to taste it in the blend? Anyone actually harvested honey they could confidently blame on privet? Not going to move hives over hedge gossip but I'd like to know if I should keep this crop separate.