Personal use: Someone at the level of confidence with IT required to install and configure gentoo would probably be able to install and configure just about any popular GNU/Linux distribution.

Corporate use: Ubuntu desktop can be deployed in various ways automatically. Canonical will sell configuration systems as well. There was at one point a desktop image available for corporate use that has the social and media integration removed. Not sure about gentoo in that area (if anyone has supported a large scale gentoo installation for end users, let us know!). I would imagine people would be looking more at CentOS or openSuse.