DFW Sky's statement is correct. He did not say that the NCE agent could assign a seat or issue a BP.

Upon proof of immediate arrival to CDG (i.e., OAL boarding pass or even confirmed bus/train ticket), the AA/CDG agent can append a code to the check-in entry that identifies the traveler as a "non-local board". That code automatically bumps the traveler up the priority list ahead of local boards with the same priority/onload code. This applies to AA non-revs as well as OAL non-revs.