Thanks all for the responses.

So, tonight at checkin at this Doubletree, I handed him my silver card and said "I think my status changed to gold a few weeks ago" and indeed it showed up "Gold" on the little rate slip he had me sign.

Hard to tell if I got a room upgrade or not since they're all suites here, but no offer or mention of breakfast. I'll grab breakfast in the morning and then ask about it being included or not if it's on my bill at checkout.