The handbook currently refers to net-misc/ntp and ntpd on Gentoo release media; this should be updated once an alternate NTP packages is chosen in bug 905433.
Thank you for letting us know of this change, Mike! We'll stay in the loop for updates.
https://wiki.gentoo.org/index.php?title=Handbook%3AParts%2FInstallation%2FStage&type=revision&diff=1236009&oldid=1228071