A small point for comparison...
For those who are comparing these new files to your old mp3s, please be aware that the mp3 encoder in itunes is *not* a very good one. At bit rates this low AAC is not really better than a Lame+alt-preset encoded mp3. AAC encoding doesn't really begin to blow away mp3s from Lame until 224k... so I for one am concerned that Apple choose 128. Surely most of this was to make the service seem speedy for those on slower connections, but AAC 192 would have been much, MUCH better.
At least 128AAC is significantly better quality than FM radio.
For those who are comparing these new files to your old mp3s, please be aware that the mp3 encoder in itunes is *not* a very good one. At bit rates this low AAC is not really better than a Lame+alt-preset encoded mp3. AAC encoding doesn't really begin to blow away mp3s from Lame until 224k... so I for one am concerned that Apple choose 128. Surely most of this was to make the service seem speedy for those on slower connections, but AAC 192 would have been much, MUCH better.
At least 128AAC is significantly better quality than FM radio.