Boxing is about not getting hit,Ifyou drop your chin numerous things biomechanicaly happen and emotionly. by dropping the chin youre waiting to get hit and your head is 6 inch nearer his glove making it easier as a target. By dropping the chin, your spine and shoulders cant react as qiuckly you put pressure on the lower back, which in turn restricts the groin and your abductor muscles. In short you restrict movement, which is restriction of mobility to evade punches. Which in turn causes panic to the senses, because they are getting the wrong signals, to perform as nature intended. Tight shoulders ,and hips and being off balance isnt the best way to start throwing punches. As Ive said before Oral balance and posture is the secret of reaction and speed. In the end all things being equal speed in correct form is the winner. plus put your elbows on your chest with your hands on your chin pulled back okay, comfortable, now drop the chin onto the chest.