I am only going by what I see at my farm and what I have been told about the difficulty bees have, in bee college.
My blueberries are about 70' from where I stage my hives. I see them flying right over the top of them to go to the fields.
In three years I have never seen my bees on blueberry flowers.
I agree they do pollinate them, Jamie Ellis had a class this past year on how to plant blueberries and where to place the bee hives so that the bees would have a better chance to land on the blueberry bushes (he named the types) that have the right type pollen needed first and then hopefully land on the plants that produce the fruits desired (cross polination, not male and female). He had planting ratios and diagrams. I suspect some types blueberry bushes are better for the bees to pollinate but I do not recall that being mentioned.