I was the one who wrote that. If Apple count the gigabytes the same way as every other harddrive manufacturer does, the 16Gb probably only has 14.99gB - OS.
For example... I have Windows, if I open Computer, and look at the space of my "300Gb" harddrive, it will show 279GB. This is because manufacturers count 1000bytes per 1kb, 1000kb per one 1mb and 1000mb per one Gb. In reality, it is 1024bytes per 1kb, 1024kb per mb and 1024mb per Gb....
Now, I'm only speculating from the fact that the manual shows a Touch with 14.64Gb free. Maybe Apple counts in the real way, I don't know.
What storage did the new ipod classic and nano owners have when they got it?