1. I don't quite get what you're saying here. How exactly does this play into the calculations?
2. I would agree for jumping a long enough distance, and being able to jump again immediately after, but this was a desperate jump that didn't leave him in position to do another jump. On top of this, reaction speed is likely slower than his travel speed from the jump, as there's the president's laser as well as the 5 or so second delay from the alser being fired from space.
3. That clip doesn't show him outpacing Jerry. In fact, Jerry catches up to him. It's possible that Rick's speed is below the average human in that verse before tech, he is an old man after all. It doesn't matter what Rick would let Jerry be superior to him in, what matters is what's shown within the story. You do realize that you can be terrified of someone that has a slower reaction and travel speed than you, right? Especially if their AP and dura are much higher. I believe Jerry saw from earlier in the episode, and likely earlier in the series, that Rick keeps a lot of hidden weapons.
"If Jerry has a massive speed advantage on him why would he be terrified of an unarmed Rick?"
Firstly, he doesn't know that Rick's unarmed. Secondly, let me give you an example.
Lets say you can run at FTL speeds. I can only move at normal human speeds, yet you can't hurt me at all, and I could blow up the entire planet if you looked at me wrong.
To bring it closer to R&M, Jerry likely doesn't have an insane speed advantage, but most of Rick's weapons strike faster than he could himself, and can protect him from more than Jerry could dish out.