And obviously you can't take a joke. You don't need 2 weeks to install Gentoo. It's a *joke*. It's a joke because Gentoo needs over a day to install on recent PCs. It's a long time. That's why it's funny to make jokes about it. Like "Chuck Norris needs only 2 weeks" and such. It's a JOKE.
but if you tell such a thing to a person who would like to experiment with gentoo - how do you think he'll take it?
A quick question to Gentoo users: do you consider your Gentoo installation a hobby? I could certainly understand that: while I don't use Gentoo myself, I do use Arch and like to install & test various distros on bootable USB sticks as a hobby (time-wasting but fun!)
arch linux comes close here, but gentoo's solution is more flexible. e.g. as you can enable/disable certain features in those packages without having to rewrite your packaging script. or you can reinstall those packages on a regular basis, in an automated way.