Mel Kiper or Mike Mayock: Of the two, who has more cred in your book?

I can't remember the last time Kiper was accurate in his mock drafts.
In 2004, he got 13 of 32 1st round picks correct and was off on average by -1.875 spots per pick.

I happen to have his mocks from 03, 04, and 05. His 05 mock is abut average with an average variance of pick by -5.656 spots.

I also have his 06 mock but never graded it.