Yes - that is what I was driving at. Plating the Copper protects it from contact with Aluminum. The problem though experienced by many (not me though) is that some have had the plating chip off or flake off (when attaching barbs or mounting) and then rapidly deteriorating. (Corrosion)
As long as you use Koolance blocks with Koolance Rads your ok.... providing the finish is good.
as for ChielScape - they have always used Copper blocks - Gold Plated..... nothing new. But thier fittings used to be plated aluminum as well... now they are using more and more brass. Their new larger 13mm compression fittings look good. But still can not touch the cost and diameter size of lets say a new DD Large Barb.
Again - not bashing.... or wanting to go back and forth with you ChielSCape - just trying to share my experience with the product. I have my Exos2 750BK with upgrade tank cooling my Xbox 360, just not my pc.