Recently brewed a red ipa using grain crushed 10/2011. The grain was stored in a bag secured with a twist tie (not air-tight), in a box in my uninsulated pantry in my NE home. In other words, it experienced both ends of the temperature spectrum in less than ideal conditions.
I came in three points above my anticipated og for fresh grain and was spot on for my fg. More importantly, the beer tastes great.
The only difference I've noticed between this batch and when I've brewed this recipe previously is less defined hop aroma, flavor and less bitterness. Hops were just as old, but stored in the freezer.
I've been so surprised by the results that I've been inspired to see how far I can push it. I've an old wit kit crushed around three years ago stored in the same place. Planning to brew it this weekend.