Noticed the following on the delta.com
Airport Information page:
Note the following check-in locations:
Terminal 2*—Flights to:
Los Angeles
San Francisco
London-Heathrow
Terminal 3
All Delta &
Northwest Airlines® flights
Terminal 4—Flights to:
Amsterdam
Berlin & Frankfurt
Montego Bay & Kingston
Tokyo
*First Class, Business Class, and BusinessElite® passengers as well as SkyMiles Medallion® and SkyTeam® Elite Plus members, may continue to check in at Terminal 2 for travel to all destinations.