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Re:Why You Still Can’t Use a Chip Card Everywhere by Symbiote on Monday July 25, 2016 @06:21AM (#12157668)
If your transactions take 20-30 seconds, something is badly wrong with the communications infrastructure in the shops you are using.

In Europe, from pressing "OK" after typing in a PIN, it takes about 2-5 seconds before the card can be withdrawn.

Re:Why You Still Can’t Use a Chip Card Everywhere by wichert on Monday July 25, 2016 @07:57AM (#12158027)
For larger stores which have a basic always-on internet connection it will be much faster. In my experience 2-5 seconds is what you see for mobile devices that use 2G or 3G, or places that still use some form of dial-up for every transaction (ISDN still exists..).