So I tried to test out the warlock pet power leveling technique tonight to no avail.

Here is what I saw using a level 60 warlock out of group with felguard pet.

Level 1 shaman kills a level 3 mob, gains 50exp.

Level 1 shaman tags a level 3 mobs with 1 lightning bolt, felguard finishes the kill, gain 15 exp.

Level 1 shaman grouped with a level 3 shaman, shoot a level 3 mob with 1 lightning bolt, felguard finishes the kill, gain 17 exp.

This trick has apparently been fixed? Let me know if I did something wrong.