No. 1 on your list is almost certainly the kitchen's fault, and not the server's.
Not necessarily, Boar. We've all seen situations where part of an order remains sitting in the pass after the rest has been delivered. That's certainly not the kitchen's fault.
That aside, I'm a little hardnosed about things like that. If part of the order is going to be late, because the kitchen screwed up, I expect the server to at least tell me; "Sorry, sir, the prime rib will be just a little longer."
Funny thing is I didn't read Abe's post the way you did. You took it to mean three of us get served while the fourth waits. I read it as bringing me part of my meal, and then waiting for the rest. That's happened to me more than once, through the years, and usually entails waiting on the protein. No doubt the kitchen screwed something up, in that regard. But it's ridiculous to be served a plate of sides while waiting on the main dish.
On the other hand, I hate it when the kitchen knowingly sends out a bad product, leaving the server to take the heat. Example: We were in a casual dining place for lunch the other day. Friend Wife had a Philly Cheesesteak, and the bun was burned on one side. It was obvious the kitchen had plated it specifically angled so that the burned spot was hidden.
Our server immediately apologized, told us he'd get it replaced, and did so. Along with telling us, as he served the new one, that her lunch was on them.
But that takes us into the area of good service, which is the topic of another thread.