Bradley 1200 series, I'm sure there must be others.
Also, re: the discrepancy issue, my observations of my own habits show that I linger under warm water... and sensor-activated faucets don't discourage lingering, unles they're also metered. Metering does discourage lingering... I get sick of pushing the button over and over and so I go away. In other words, I don't think it's that easy to equate metered usage patterns to non-metered usage. We need field testing, not models.