[ETL]

This is, strictly speaking in terms of QM itself, not true. All particle interactions occur at space-time points. They are "events" in relativistic terms.

In one of the two major QM interpretations there apparently is some form of 'signal' that reaches a particle's counterpart changing its properties--instantaneously, provided the two were once 'entangled' quantum mechanically.

[dr_lew]

In one of the two major QM interpretations there apparently is some form of 'signal' that reaches a particle's counterpart changing its properties--instantaneously, provided the two were once 'entangled' quantum mechanically.

Well, just as I said, you are speaking of interpretations of QM. But what good are they? What basis do they have? I claim they are revanchist classicism.