Not totaly true, it depends of the gun you are using, and the speed of the guy running "trough".
Also, alot of people actually think that people run trough their lines, but its not. It's mainly because their lines are a little bit to low, or to the left, or to the right or not enough accurate.
(Even myself, i watch oftenly demos, and this is about the accuracy of the bullets, not shooting the exact path that they took).
Also, you have to take in consideration that people are actually smarter than before, they look at the lines, and try to jump over, or under.
The only problem that i can think of with the new ball speed, is about them falling down on the ground on high distances.
I think the ballspeed is more realistic this way, and does not need to be changed.