Gentoo Linux GCC Upgrade Guide (Update)

I decided to do the slow but safe upgrade, which requires all existing packages to be re-emerged under the new compiler. All in all there were over 100 system packages and over 500 world packages. It has been going for about 24 hours now and has about 400 left. Hoping and praying that it doesn't pull up over 600 updated etc config files that I will have to go through...