I am not surprised at all that they helped him. Apple has great customer service, and it would take them more time to explain to him why they can't help him, than to actually help him. In this case, the issue would have been the same whether he had Panther, Leopard, or whatever installed. It was a simple app removal.
Apple loves for him to go and tell his friends how helpful they are, and how great they are. Just about everyone who has dealt with the Genius Bar will probably tell you the same. Go sit down an listen in on some of the issues that people have, and how the Genius bar helps them. The last time I was there, they helped a lady before me, who "lost all her ram." I wanted to laugh at her, but the Genius deleted 30 something copies of the Adobe CS installers from her Applications directory, to "help her get her ram back." He then, helped her install her Adobe Photoshop on what looked like a 2007 MacBook Pro.
The "help" that I received that day, was using their charger to charge my MacBook Pro, because I forgot mine 360 miles away.