Hmmm, I found this interesting. No date but its AL and sounds pre-velious.
http://www.afterlifeguild.org/Thott/kunark.php
The most interesting part, 3rd section, 1st paragraph, is where Thott mentions it takes an "hour or so" to reach level 2. On P99, with no XP cap per kill, are we are essentially leveling faster with new characters?