In Harry Potter and the Prisoner of Azkaban, during the Quidditch Match against Ravenclaw, Cho Chang:
decided to mark him [Harry] rather than search for the Snitch herself...All right then, if she wanted to tail him, she'd have to take the consequences. He dived again, and Cho, thinking he'd seen the Snitch, tried to follow; Harry pulled out of the dive very sharply; she hurtled downward.....
While Harry may not have known the name of the tactic, his move in his third year is almost certainly a Wronski Feint, yet, after Harry sees Krumm perform the same maneuver for the same reason (a diversionary tactic) a year later in the Quidditch World Cup, Harry thinks to himself that he is:
itching to get back on his own Firebolt and try out the Wronski Feint.....Somehow Oliver Wood had never managed to convey with all his wriggling diagrams what the move was supposed to look like
Why do Harry and Wood not recognize that he, Harry, had already successfully executed the maneuver?
The Feint appears to be a fake play to the Snitch, a sudden dive and then pull up out of the dive to draw the other Seeker's attention and direction. At the very least, of course, there are differences between a third-year player's ability vs a national team level Seeker, but Harry should have at least recognized something along the lines of "oh! I've done that, not as well or cleanly". It just seems odd that the Feint is portrayed as a move that Harry was completed confused by until he witnessed it, when he had in fact, already performed at least a close approximation of one.