Mostly been working on Debian recently, including this new package:

apt-gentoo

apt-gentoo enhances the Debian package installation experience to make it fully competitive with newly-popular source-based distributions. As packages are installed, apt-gentoo automatically downloads their build logs from the buildd network. The logs are then slowly scrolled past on the user's terminal to simulate building the software on the local machine. apt-gentoo optionally, and by default, gives increased realism by spinning the CPU in a tight loop between build log lines, and writing large files to disk.

An additional utility apt-gentoo-benchmark is included to tune the delay loops for your hardware by finding the length of time taken by typical compiler and linker runs. (On slow or low-memory hardware we recommend leaving these values at their defaults.)

Please test - download the deb from http://www-jcsu.jesus.cam.ac.uk/~mma29/apt-gentoo/