I did not read much of the comments, or the article, but sure. It is another tweak.
The new thing is swapping bikes as done in significant GT stages and the WC ITT. Moving a seat might be a little un-cool, but also could be quicker than a bike change.
The fastest position may not be the most powerful one depending on grade and wind. Choosing a more powerful/more aero position by the flip of a switch based on conditions to get max speed seems reasonable to me.