.400 pro tree help

I remember the pro tree now. You stage, then the light above the green one (White or Yellow) comes on, and that's when you hit it. Then .4 seconds later the green at the bottom comes on, right? So if you and your car react and move forward enough to cross the start line within .4 seconds then you have red lighted. So now they have reduced that time to .370 of a second to prevent that. I'm sure it made alot of people mad when they would red lite because they and their car reacted so quick. Prob a good move, but they should have let the racers know first.