I just bought an Apple TV yesterday. I've not been able to successfully complete the first sync. On the first attempt, it got hung up on one TV show. I let it sit for about 15 minutes and the progress bar barely moved. I quit out of iTunes and restart the Apple TV, and when it started syncing again, it finished in less than a minute. It was very fast. I thought that was great, so I added my whole TV show collect to my library and it started syncing again. This time it got caught up again.
Is this an Apple TV issue or an Airport issue? I am having additional Airport issues that I have posted in that forum, but I'm not sure if this is related.
I am aware that I can connect it via ethernet to complete a sync, but I've not tried it yet.