This is a little exaggerated. With a direct physical connection, transfer of data will be limited by the speed of the slowest relay in the transfer chain which will likely be the write speed of TSA computers used to copy the information.
It is frightening how border agents are able to demand your data. But saying a few seconds conjures “one-one-thousand, two-one-thousand, three-one-thousand,” data cloned! I don’t think we are quite there yet.