When these code share and alliance arrangements started up, the emphasis was on a "seamless" experience. You still see some inane signage at smaller US airports, where a variety of European legacy airlines announce their curb side check in points to arriving passengers.

There was a time Delta put one of their flight attendants on code share flights, who went through the plane making sure the Delta passengers were being taken care of.

Now we have incessant hair splitting about every aspect of the rules/perks/programs. Anything of substance is weighted against the customer. How many threads are there on the ridiculous lounge situation at CDG? If any international point in the world need to be a place where Delta insisted its regular club policies were enforced, it would be there. And what possible damage would be caused if some (why not all?) the U.S. clubs reciprocated?

I am surprised at this attitude by VS. I flew them quite a bit during the 1990s code share period with Delta and was looking forward to a trip on them, hopefully later this year. Now they are hair-splitting, even when Delta owns a significant part of them?