10 second flow rate

I received the final comment for one of my LEED for Schools projects: "Metered faucet duration has not been revised from 10-second duration to the default 12-second duration as required. The WEp1 Additional Guidance document states that design case autocontrol/metered faucet durations less than 12 seconds are not permitted for LEED calculations as they are insufficient for typical handwashing." My project has in fact installed a metered faucet that has a flow rate of 10 seconds and not 12. We have documented this with a cut sheet that we uploaded on LEED Online. I realize that the default value is 12 seconds but this just seems silly of a reviewer to say. Who is to say that 10 seconds is insufficient? It's seems like an odd system if we cannot be incentivized for installing a lower flow rate. LEEDuser team, any advice? This credit was denied based partially on this comment. Thanks for your help.