Okay, maybe I was wrong the the cars included the railsounds, because the specific cars that were supposed to be included were the ones with detailed interiors and no sounds I guess. I'm not sure if that was clear when I ordered over a year ago, since they seem to have changed their pages. The photo on the sold-out product page do appear to look like the Woodruff cars though.

"Lionel Trains" Facebook page posted this video just last month (Oct 16th):

A little after 34 mins into the video the narrator says: "For those who ordered the 2-pack, or the special deal from Lionel Store, you'll be getting a set of the Woodruff sleeping cars along with the two locomotives..."