In short: lowering the nose earlier would result in landing earlier because it would increase ROD so in fact shorten time in the air (flying time).
In short: this is crap.
First of all nobody mentioned lowering the nose. Not raising it would already be enough to improve gliding performances.
You think that the longer you stay in the air the further you go and that's wrong. Gliding faster will bring you on the ground earlier, but the extra speed you have will take you further, even with a reduced flight time. That's what best glide speed is all about.
It works just the same on helicopters during an autorotation. To go further you need to dive.