The public transport cards here in Paris also use NFC. This means you can use your phone to recharge them, or use your phone directly to access the subway network. As far as speed goes, your card/phone is detected pretty much instantly when you tap it on the sensor, at least when the gate isn't broken.

The only time I ever had to wait in line to get into the station was after a stadium event, which is understandable. Rest of the time, you can pass the gates almost without stopping.