I've been using Gentoo on servers for a while but just find out that there's a Sabayon base on Gentoo tonight. There's still 2 hours to complete the download and I can't tell you how excited I am. Thanks for Sabayon that save months or years of my life (cause emerging Gnome takes me days)!!
Remember you can use binary packages now via entropy and equo/spritz, so even major packages have a much reduced time to install, but its fully gentoo compatible so you can compile them if really really want to