John Dominic Crossan said something to this effect:
I would be glad to give the Pope the gift of infallibility.
If he would only respond with the gift of accuracy!
The stated clerk of the PCUSA responded to the Pope's declaration. Apparently, the stated clerk took offense that the Vatican doesn't think Protestant churches are "churches in the proper sense."
No skin off my nose. I would rather be a church in an improper sense any day.