I would be curious about this as well, at least when it comes to regards with the Escape by Discover.

I found a thread before from someone who said they had Lounge access, though I wasn't sure if this was an undocumented feature that the card had, but its just that so few people have the card and are vocal about it, or if this individual is a special customer being given extra treatment.

I've called Discover before, but they only stated the benefits that were on the website, and were unable to verify the existence of Lounge benefits.