To be honest - I don't know why you keep recommending Gentoo for new users: it's almost guaranteed to put the majority of them off linux for good.
I agree that Gentoo is a very good way to really get to know linux, but most new users will be coming from a Windows environment and will want something that just works with no faffing.
For example - Portage is an excellent package manager that gives you a phenomenal amount of control over your system, but generally, for new users - it's hard enough for them to get their heads rounds apt / yum / pacman / whatever, let alone setting use flags, etc.
OK - so this isn't true for every new user - but I'd say it is for 99% of them.