Very likely that I mis-heard the ad, since I start yelling very early on and often can't hear over my own shouting. Maybe the ad does not mention antibiotics. But when I was at the A&W last night (yes I was) I noticed little promo cards on all the tables. IT says no hormones were used in the raising of the beef, it's quite the little write up. Worth a read and more explanatory than the TV ad is. But print media is aimed at a slightly more literate crowd, and TV is aiming at, well, the drooling masses.
Coop, I chuckled over your preference for heifer meat. I have not heard of anyone spaying a heifer. What would be the point? The cost of the procedure would be considerable. We had a spayed mare, a procedure considered not all that common and quite costly in horses. Only done, according to my vet, in performance horses who are very good a their jobs but bothered by bad heat cycles, so you spay the mare so she is not affected by heat cylces. This is not done, according to vets, on backyard nags.
As for beef? I want a fat, lazy, useless steer finished on grain, laying in the sun, chewing his cud and gaping around stupidly. I like FAT on my beef. White fat. Lots of it. If he's had an antibiotic to cure an ill, I don't care. But I have no idea why a steer of appropriate breed and well fed should even need a stinking hormone. If it's cheating in our athletes, it's cheating in our stock yards too.