Well, in my last two games, we have had the following race distribution:
Human 8
Elf 1
Half Orc 2
Half Orc is one of the most popular race choices among my players, whereas Dwarves are shunned. I don't see any situations coming up where the Dwarf Fighter is overpowering the Half Orc Barbarian.
Furthermore, I would like to argue AGAINST using Strength for Intimidate checks. Why? First of all, many things might be intimidating other than the guy who's built like Ahnold Scharzenegger, like wizards who know fireballs, or the infamous assassin. Why not give Intimidate bonuses for other stats than Str, since sneak attacks and spells can hurt at least as much as normal beatings.
Second, the intimidation of some muscle-headed thug is rational. If him and a bunch of his buddies surround you in a forest and ask for your money, rationally one might decide to give him the money he wants to avoid being hurt. Or you might run, scream for help, cast an Empowered, Maximized, Sonic-Substituted Fireball, whatever. Intimidate's effects are, in my opinion, irrational. Provoking fear that might not otherwise exist. Making the king on his throne, surrounded by elite guards, stll on edge in front of the savage barbarian.
Another point I'd like to bring up: Constitution is NOT the most important stat. It's often the second (or maybe 3rd) most useful stat for every character. A more efficient build uses a race that increases one's primary stat, and then gets a decent Con. (Although Elves still suck)
And while this mechanical analysis is impressive, do you guys have a bunch of players using l337 Dwarf characters, or have you noticed that the Dwarf character overshadows the others (by virtue of being a Dwarf)