Down here, they say that oysters are only good in months with an "R" in them. Those harvested in Ray, Rune, Jury, and Aurgust just don't taste the same.
Oh, I agree! We only eat them in the winter. Our friends shuck and froze these shortly after we left them in March. (We spend the winters down the street from them, and actually should see them about 3 months from today in Texas). They were fantastic!