Thanks for the response. I'm a bit surprised no one else has responded to my post but I'll check out that discussion you linked to. I have also submitted feedback to Apple regarding this issue under iTunes and iOS 6 so I hope you do too.
I find it bizarre that such an obvious bug would not be noticed before they released iTunes 11 and/or iOS 6. I've also noticed a few other issues with iTunes 11 like the store not always connecting so I have to close the app and restart it and then it connects. I also get delays and beach balls sometimes when simply selecting a song or video. Anyway, that belongs under iTunes.
I have to say though that other than that issue I am extremely impressed with the performance and reliability of my iPad 4. Coming from a 1st gen iPad to the 4 is a night and day difference. Everything about it is much quicker, such as wifi, cell service, even on 3G, and things like browsing and opening and using apps. I'm no longer using my little Windows laptop as browsing is just as quick, if not quicker, on the iPad. Even the battery life is better. Charging is not as quick but certainly much better than I experienced on the iPad 3 when a friend bought his and quicker than my laptop.
Thanks again for the response.