Keep in mind that DL does not publish award charts for non-US departures, and thusly, you don't notice the truly atrocious devaluations. The worst I've encountered thus far is Hawaii-Asia for 140k/70k in "Saver." Of course, because DL award pricing is done by "the system" (which is immune to human reasoning) you can never be quite certain of the actual mileage price DL charges for a ticket.