That is becasue they offer all their machine pre downgraded to Windows 7 from Windows 8.
Nobody buy windows 8 if they can help it. I work for a reseller I know.
Plus Lenovo have fixed their biggest issue inthat they actually make it possible to find specs and accessories without having to sell your soul or wade through their website.
They still have an issue with some laptops listing things as optional and not telling you if its actually installed.