jpender wrote:I had a hard time telling the difference between those four cups. I knew two of them were vac-sealed and expected those to be slightly better in terms of aroma or lack of staleness, or something. I eventually picked the two cups that I thought were marginally better. They turned out to both be the non-vac-sealed samples. Probably just random chance.
I repeated this and once again I chose both of the non-vac-sealed coffees as my favorites. Again the differences were so minor as to border on imaginary, but I believe the odds of this happening twice by chance alone are 1 in 36. So now I'm starting to wonder.
Could vacuum sealing this coffee have actually made it worse?
Edit (10Feb): I blind tasted this coffee two more times, once as two Aeropress brews and once as two Brikka Americanos. While the differences in these cups was very subtle, I again chose the freezer bag samples as my preference in both cases. The odds of continually selecting those by chance alone are 1 in 144.
Edit (19 May 2017): I took the remaining samples out of the freezer (6 months post roast) and blind tasted them. This time my preferred choices were more evenly split between vacuum bag and freezer bag stored coffee beans. But the truth is, they tasted virtually identical to me. The same was true 3 months ago as well. I think that 1 in 144 aren't really that long as far as odds go. It's like rolling snake eyes and then flipping two coins and having them both come up heads. Not particularly likely but not so amazingly unlikely as to prove the dice and coins are loaded either. Anyway, bottom line from this test is that the vacuum bags did not preserve this coffee any better than the ziplock freezer bags, at least not enough so that I could discriminate between them. For what it's worth.