How you use your voice is absolutely the most important part of any conversation, not just with a woman, but in regards to dating, especially with a woman. If you speak to a woman and you speak very slowly, barely able to get a couple syllables out per minute you are not going to capture anyone’s attention.
In fact what is more likely to happen in this case is you will bore whoever your conversation partner is into a very slow comma then be required to call the Emergency Services so they can be taken to the hospital. How embarrassing if you have to tell the Emergency Service Technicians you bored the person into a dull slow comma. The EMT’s better be very careful around you so you don’t cause them to drop off from boredom either.
On the other hand, if you speak so quickly you are often asked to repeat yourself and maybe you also find people often need to take some type of headache medicine directly after speaking with you maybe it’s time to slow things down a bit. Remember, it’s not a race to the finish line; your point will still be waiting for you when you get to it, and just because you talk faster than a moving train does not mean anyone understood what was said.