When Wong Yu Yin first witnessed Kiu Fung in action, she correctly guessed that her cousin Mo Yung Fook's martial arts were far below those of Union Chief Kiu's. Wong Yu Yin wasn't the only one who was familiar with Mo Yung Fook's martial arts level (although she was arguably the most familiar with it). Bao But Tung and Fung Bo Ngok, who also witnessed (indeed, directly experienced) Kiu Fung's prowess that day, must also have been familiar with their young master's martial arts level and realized that it was far below that of Kiu Fung. Ah Chu and Ah Bik likely also noticed.
Did any of the others besides Wong Yu Yin think about or remark upon this?