I am from the northeast, and I am quite content with cars pulling out in front of mine.
What I am not content with is having to slow down for them.
If you accelerate enough that I do nothing, that’s fine — no harm, no foul.
However, if I have to touch my brake pedal — even a gentle tap — you have failed as a driver.
You are no longer taking advantage of a small gap in traffic.
You are holding it up.