Hummm...that is interesting. I guess the computer could always "watch" where the throttle position sensor is when the brake circuit is activated. It also wouldn't be too far fetched for there to be some type of "calibration curve" so that the computer would expect that the throttle was closed and it could start to set up regenerative power. If those two conditions were met, hitting the brake with the throttle still slightly open would certainly "skew" the curve and seem to make the re-gen come on at an earlier time. Keep us posted on the behavior.