When you go to:

http://www.delta.com/traveling_check...ions/index.jsp

and select "Skyteam Elite Plus (Delta Platinum Medallion) Member" on the drop down menu...all the KLM lounges in AMS disappear from the list.

This would imply that a SkyTeam Elite Plus would NOT have access to those lounges. Other European lounges, Berlin, Athens, etc...do remain on the list.