Updating iOS is a manual process. You can update iTunes without any fear that it is suddenly going to "infect" all of your iDevices with iOS 6.Originally Posted by wvkawboy
I took all of the music off my iPad to clear enough room for the update. When I put it back, I found that it appeared to use a lot less space than before, so it appears that some work has been done on the compression system in either iTunes or iOS. I presently have 266 songs on my iPad, occupying 1.1Gb of storage.