Just back from visiting the AA flagship lounge, QF business class lounge, and the AS lounge (I was flying AS LAX-NAS) during breakfast and lunch.

Breakfast - AA far and away the best, variety and interesting dishes. QF was similar to a buffet at a low end hotel. AS was in between, though make your own pancakes.
Lunch - AA still the best of the 3. QF improved but less variety, though the soup was excellent. AS - did not use.

As to alcoholic beverages, AA had good variety of wines and Piper Heidsek Champagne, QF had a good Chardonnay, but nothing else appealled to me (standard bold clumsy reds), AS did not try. I don't drink beer or spirits.