1. "but users of binary package management still install extra support for things they may never use."
2. Custom kernel with only what you need
3. "Even menial things such as choice of system logger and cron daemon can be chosen and configured exactly the way you want"
Why are those meaningful advantages? For example, if it makes my computer run faster, great, but does it? (I doubt it.)
Most of the other stuff is just giving major props to Portage... I mean yeah, I'm sure the "revdep-rebuild function" is great, but since I'm using a binary distro, I don't need it!