In my experience, in the US, if we're talking foreign wines, the percentage is even higher, unfortunately. I am sure it has a lot to do with transportation. We have discontinued going to a particular wine merchant because of the extremely frequent trips back to the store with the opened, unconsumed bottle... We plan to try another, whose owner is French. We'll see if the results are any better.About 3-5% of all wines will be bad upon release, due to cork failure or taint, generally, but a more serious issue is heat damage or improper storage. Â Provenance is very important when it comes to older wines, so that's why it's a lot easier to buy on release and cellar your own wines. Â Purchasing older vintages from sources that you haven't dealt with in the past is going to be risky.
Last night: peppered beef roast with baked eggplant (thick slices topped with tomatoes, garlic, olive oil and feta cheese). 11 $ Rancho Zabacho Zinfandel (I forget which vineyard).