From The 2004 U.S. Class Chess Championships: uschess.org/news/press/uspr0423.php
"An interesting piece of tournament “theory” was put to the test at the U.S. Class, when Kansas Expert Tim Steiner proved why the time delay clock is now an indispensable component of the serious tournament player’s competitive regimen. With his time running out, Steiner’s lone White Queen was compelled to distract the opposing King, Rook and Bishop from otherwise shepherding the Black f-pawn to an inevitable coronation. Through an amazing, whirlwind series of checks, pins, and “quiet” threats of forks and skewers, Steiner was able to stave off the advance of the f-pawn for over 60 moves-- despite having exactly ONE SECOND left on his time-delay chronos! His opponent, rated over 500 points higher and with over ten minutes remaining, was unable to prevent a successful 50-move rule draw.
The time delay was absolutely necessary to prevent a brilliant drawing motif from coming to a tragic end. No claim of “insufficient losing chances” could ever be considered, as the chances for either side to lose were mind-boggling indeed, let alone “sufficient.” Without the time delay, White’s flag falls well before he can rattle off even a fraction of the 50 required moves. With the time delay, he proves, over the board for all to see, that his opponent can make no progress beyond his half of the point".