If you have apps like Zinio which have a lot of in-app downloaded content, it takes a long time. Hopefully Apple will fix this in future, I believe OS4 increased backup speed for iPhones so hopefully it will help for iPad, whenever it arrives.
For now I just cancel the backup most times and only let it go when I have the time to wait for it (overnight for example!)
For now I just cancel the backup most times and only let it go when I have the time to wait for it (overnight for example!)