No, it's not a library.
Let's say I open up the Documents folder. I reset all of the column widths to fit. I then go to one of the sub folders, in this case "AutoCAD files". All of the column widths are the same as Documents folder that I just left. I reset them to fit. Now, if I go back to the Documents folder, instead of being set to fit the way I left them, they are all sized the same as the sub folder I just left and I need to resize them again. This is REALLY frustrating. I did not have this issue in XP.