Actually there are some Orthodox who agree that “rock” refers to Peter.
Unlike the Catholic Church, however, I do not believe that the Orthodox is uniform in their belief on the primacy of Peter. It is my understanding that generally speaking Orthodox agree that Peter is the first among equals (and therefore holds a special place). It, however, does not agree that he is Supreme (ie. Primacy vs Supremacy).
That is ludicrous. I don't know how people can rationalize being equal and being first at the same time.
It can't be both at the same time.
Equal precludes having someone in first place. Being first precludes equality.