The youtube vid I posted in #97 shows it pretty much every bump. For example the 1st turn. Watch the tips as the skis go sideways into the bump from the previous left. We can see the tips (just) continuing to move sideways. They are also coming towards the camera and they crest still going sideways. There's enough rotational inertia for the tails to keep coming around even with the tips still in the air. Even clearer on the next left turn starting at 0:15 seconds.
Of course she does a great job with all the other things you are talking about to get those terrain following tips down and on to the back of the bump.
There are lots of ways to ski a direct line. On the video you highlighted, there's very little speed control from driving the tips into the bump. The vast majority of speed control for that video is from skidding down the backside. There's another style where people try to point the ski down the hill until the tips contact the front of the bump, then once the tip starts driving into the bump the tails swing around. It gives a little more of a carve look. Those advocates say, don't just throw your skis to the side, but be patient. I believe Martin is this style. I could show you still frame comparisons, but I'm too lazy. I'm on vacation. Among these great direct line skiers, they will compare and contrast their styles as much as we compare direct vs non direct skiing. For this particular situation, I don't know how much is just individual style, conditions, or new school vs old school.