score:3
St. Robert's opinion that St. Peter consecrated the other Apostles bishops doesn't seem common. For example, D. I. Lanslots, O.S.B., says in his The Primitive Church: The Church in the Days of the Apostles ch. 15:
Christ directly consecrated His Apostles bishops; they and their successors were to consecrate all others.
The "Apostolic College" Catholic Encyclopedia entry distinguishes "Apostle" and "bishop":
Although both, bishops and Apostles, are appointed by Divine authority, yet the Apostles received their commission immediately from Christ, whereas the bishops receive theirs but mediately, i.e. through the medium of human authority. The power of order and jurisdiction is the same in the Apostles and in their successors, but, whereas the Apostles receive it from the Divine Founder Himself, the bishops receive it through the channel of other bishops. Immediate commission implies, in the missionary, the power to produce, at first hand, credentials to prove that he is the envoy of God by doing works which God alone can work. Hence the charisma, or gift, of miracles granted to the Apostles, but withheld from the generality of their successors whose mission is sufficiently accredited through their connection with the original Apostolate.