That's plain nuts.
I can't even begin to understand how these Buckyballer Cmdrs manage to shave off so much time per jump that it adds up to a total journey time anywhere like that. I'm not suggesting they didn't manage it, I know proof is required and provided. It's just that its, well...nuts.
I first started timing a long distance "run," to work out how long it took on average to complete one jump when I was heading back to the bubble in my 42ly(ish, if memory serves) Asp early last year and it seemed I was able to charge the FSD, jump, line up and scoop to full, realign for the next system and charge again in around 50 seconds. On my way to Colonia last week, in my 80ly Anaconda-taxi, I used the Neutron Highway for all but a couple of jumps (with no extra fuel tanks) and found that having to jump to another system every, roughly, four jumps was what really added the time to my journey. Obviously it was still far quicker than jumping 40 or even 80lys each time but still.
The 'workflow' if I can call it that that they use must be super slick, I imagine also you'd have to plot and possibly favourite your route before hand to keep it all as slick as possible.
Impressive....but I doubt I'll ever get anywhere close and would likely go slightly mad if I made the attempt.
*takes hat off to 1 hour 55 mins*