I recently flew back MAD-LHR-JFK, and when we checked our bags at the counter, I noticed the BA rep didn't tag our bags with the priority bag tags before sending them on their merry way. I commented on it to my better half, and lamented it since I'd been having pretty good luck with AA paying attention to the priority tags. Well, to our surprise, our bags were among the first off the belt, and they had been re-tagged with the AA priority tags placed between the bag tag. Is this new practice? I was really surprised at this, but glad to see that this perk is extended to interline travel as well.