the current title has implications not yet rigorously tested and people is already looking into selection bias to explain correlation where probably there's none.
That is not the same at all. From the abstract:
> More than any other species, humans form social ties to individuals who are neither kin nor mates, and these ties tend to be with similar people.
They specifically tested friends to include the general preference of friends to be similar.
the current title has implications not yet rigorously tested and people is already looking into selection bias to explain correlation where probably there's none.