Gary,
I think part of it might be the "SP is always best" issue. If you're generating dynamic updates based on change tracking, you'd need screeds of code in a SP to manage that, plus presumably more in the middle tier to process the deltas and tell the SP what to do. In which case the obvious question is "why not build a dynamic parameterized SQL Update and bypass the SP."
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
