Rollout vs ET

I always shallow stage for my "rolling 6" start". I usually do it because I'm foot braking and when I lift the brakes, I'm trying to give them an extra 100th of a second to release... LOL I've not seen a tenth....
For sure, I always shallow staged the handful of times I’ve run at the track to get the little ‘run at the starting line’, just wondering how much difference it might make. A couple years ago my buddy was trying to crack into the 11s, as he got against the converter, he crept deeper into the beams, then went 12.05. I told him “I bet that was your 11 if you hadn’t pushed in deeper.”