There was a time, before I had children, when I practiced proper bathroom etiquette. If I entered the ladies room and a stall was occupied with a person quietly waiting for me to leave, I would go about my business quickly. Truncating my visit, if necessary, only to return when the room was vacated.
Nowadays, time in the loo is much more precious. I never know how long I have or when I will likely be able to return. More often than not, if I do not use the facilities before leaving work I am out of luck until both girls are in bed. Unless I plan on having an audience...who likes to inspect my undergarments and critique my technique.
In other words, I have no time for niceties and politeness. From what I understand, this is not part of the "bro code". Men don't really care about bathroom protocol unless it involves standing too close. Do they actually have it right?