If you don't like the suggestions that are being offered here, look for help somewhere else. There other iPad forums on the Internet. Nobody is twisting your arm and asking you to look here for help.
I realize that Apple suggest coming here to ASC disucssions, but if it doesn't work for you, move on to somewhere else, where you feel the support is better.
Many of the suggestions have helped others reconnect to the iTunes Store and my guess would be that most of those users are happy to be able to connect again and aren't looking for answers above and beyond being able to deal with the issue.
Nobody here knows why this is occurring, we are just trying to offer help with the knowledge that we have at our disposal and the knowledge that we have gained with our own iPad use. If somebody had the definite answer as to why this is happening, it would have been posted by now. Nobody is withholding secret information.