An experienced fighter at most to any level, will start picking up each others timing even with never having fought before and only watching videos to study. Then this is where feinting and being unpredictable comes in, to throw off your opponent from timing you.
I personally think that making too loud/distinct noises will help your opponent as it's an additional "tell" for them to pick up on. You can see that Holly tries to feint the noises later, after getting clobbered plenty by GDR's counters. But GDR doesn't fall for them because her highly experienced fighting senses has already locked in to not just the noise, but maybe even the pitch, loudness, etc. of the noises from a real attack.....in combo with the other indications such as: the rhythm of Holly's movements, demeanor, facial expression, etc.