I have seen this question asked over, and over, and over, and over, and over again… with no one never really providing any evidence to whether it does or doesn’t. Considering on the Dirty Bomb stream today, people were equally confused, I thought I would prove the answer here.
So where did the rumor start?
It actually began due to an old glitch on the map Bridge, where multiple people standing near the EV would cause it to move faster. - In the June 2015 Sparks Update, this issue was fixed:
Full patch notes: http://dirtybomb.nexon.net/news/2435/sparks-update
So what is it now?
Since this bug was indeed fixed to make the EV move at a constant speed on Bridge, it has not been altered since. The more people around an EV does NOT make it move faster. So hopefully this can put this annoying rumor to rest that I keep being asked around the forums and social media, as well as in-game. 

:s