Exit row availability is not showing on laptop, browsing delta.com with Chrome. Oddly, if you do a dummy booking in Z, and scroll the seatmap down, you can see if exit row seats are available.
I really hope this is a bug and not the prelude to Silvers not having advance access to exit rows. I spend a lot of my own money (no biz travel/no expense acct) to meet MQDs. Hate to see yet another devaluation (though I know they'll come. Bah.)