Christ was downgraded, because it was a team effort with St. Paul, who was ranked 4th I think (the message plus the messenger). Neither would have had much influence without the other is the theory. Mohammed was ranked first because he was a twofer. He rewrote the map in a secular sense as a conquerer, as well as single handedly found the second most influential religion on the planet. You will never guess who was ranked fifth, assuming my recollection is correct. :)
I meant to add you to my post above.
Who was ranked 5th?