I was browsing the web and stubled upon this review:
http://www.itpro.co.uk/638773/ubuntu-vs-windows-7-on-the-business-desktopI think it is giving a nice review on Ubuntu (and not exactly a comparison with W7). I was especially triggered by this:
If bandwidth is a concern, it’s also possible to create an offline update repository that downloads files just once, and then redirect each Ubuntu PC to this instead.