Nonsense

Absolutely, it comes down to your tolerance for being "that guy or not".

I generally look at how many are behind me and also how clear it is in front. If they can take off and go their own way or they'll get stopped 20 later. Also on whether I'm keeping up or not with the guy in front. If I'm not keeping up I either speed up or move over.

Ultimately, this stuff makes extremely little difference in your actual commute. Like less than a couple minutes ( probably less than that). It just has so little impact compared to other things. So I try and be philosophical myself and let them pass.