Since when does it take four to six weeks to post a NW operated, DL-coded flight on my SkyMiles account? It used to post in only 48 hours.

From: "Customer Care" <[email protected]>

Dear Mr. Poor,

Thank you for contacting Delta Air Lines.

SkyMiles earned for traveling on Northwest Airlines will be posted
within 4 to 6 weeks after the completion of travel.

Your selection of Delta is appreciated, and we will always do our best
to merit your confidence and support.

Sincerely,

Michelle xxxxxxx
Online Customer Support Desk
http://www.delta.com