Having worked in the public safety industry from the technical side I have some expertise here. But since you don't know me, do your own research.

How long for a match? Almost instantaneous, especially when you're matching against a small database. Disney probably has more visitors in a year than we probably have terrorist fingerprints on file, so expect that sort of response time. In other words, it doesn't slow down the lines at Disney so it shouldn't here. This technology has been working just fine since back in the mid-1990s.

The time constraint will be the amount of time it takes people to place their fingers in the sensor. But you can do that while the customs people are asking questions. That's actually a way to improve the questioning -- tasking someone makes it harder to keep their story straight. That's one of the reasons the customs people love to come out and ask you questions while you're waiting for your baggage.

Think of all the companies that are using biometric sensing for security applications. Lee Majors even did an IBM commercial with a six million dollar man reference. This technology is now old stuff.

How accurate? It's very good. About 99.9% when you're using 10 fingers. There will be false positives and false negatives. False positives means more questioning, false negatives means a bad guy gets through, and it's about evenly distributed between them. But I can't think of any other layer in our security that has a 99.9% accuracy rate.

How much will it cost? Disk space is amazingly cheap these days, and they're not storing an image, they're storing the geometric representation of the image so it doesn't take much space. Storage is not a detectable cost in this plan.