I recently shot a roll of Ilford Delta 3200 that expired in 2006. I bought it last year and immediately stuck in in the freezer.
I'm surprised at how well the images appear, at least as far as scans show. I had heard this film ages poorly and will be foggy. Am I not seeing the fog? This image, for example, looks fine to me.
Note - I shot the film at ASA 1000, and developed it in Xtol (stock) as if shot at ASA 1600 with minimal agitation.