If I remember correctly, there was an article in an issue of Dragon that talked about a perception type score. I can't remember all the specifics but what our group wound up doing for a while was taking the average of your Int and Wis scores and using that as your perception score.
Yeah I remember that as well. Also a Comeliness score in addition to Charisma to reflect CHR being personality and ability to charm people while Comeliness is pure appearance.
PCs are not exceptional. They are normal Joe Shmoes stuck in exceptional circumstances.