http://www.decanter.com/news/285124.html?aff=rss

"Another advantage of sintered glass, he said, was that it would show up any problems of leakage in old wines, which which an airtight seal such as a screwcap does not allow."

I read that as "Screwcaps aren't as good as glass stoppers, because screwcaps don't leak"

I can understand that a screw cap top would possibly not show signs of leakage with a wine that was cooked.