I wish I could tell you for certain, but I will assume total closing of the throttle.. but it really didn't matter. I wasn't sliding on rain or sand. I was on an ice rink at 50 mph... on two wheels. The bike was essentially trying to highside my dumb ass, but I used to be a cowboy in a former life. I really do think the low cg of the bike is what kept me upright. That and knowing full well the worst thing I could do was touch either brake. I did the right stuff, but a different bike may have resulted in a different outcome.
One very big difference between dirt riders and street riders is the cg of the motorcycle and rider, as a whole. Street riders rarely stand, but doing so actually lowers your body weight from saddle to pegs. 200lbs 3' off the ground is considerably less stable than 1' off the ground... especially on a slippery surface. A lot of videos I see of these giant BMWs off road really grind away about standing on the pegs. The bike is already balanced incredibly well. Standing helps keep that cg low. The rider aids just make it that much easier, supposedly. I have yet to really tackle anything gnarly enough to require electronics.. but the hill hold gizmo was nice to have. I was able to relax and assess the terrain before making a very wobbly transition from dirt to pavement. The bike is smarter than other bikes I have ridden. You two should ride it this season. I want to ride the Goldwing down 800 and see how the other half live.