Just dropping my experience with alien race creation in the pot. Right after I installed 3.2 I was testing it out and started several games one after the other. In the first two, by the time I had expored 12 to 14 systems I had discovered 7 races in one game and 6 in another, it kinda had me worried that the game was going to be over populated for what I like. I checked and had not changed the creation % any, turns out it was just two flukes in a row, as all my other games seem normal.
Mark