you mean the individual chance of people or overall?
Both, but when you bring damage and luck differences into play, then naturally the individual chances will start to differ from the old system. It would then only be the overall chance.
If it's the same system I am thinking about
It's not. Basically, what happened is this: we put in the Gauntlet point system as it was coded and posted on the forums ages ago. We then ran a simulation to see how many artifacts it dropped in this new system, and found that for 6 people doing runs, the number of drops was
20 times as high. (For more people, the chance blew up even more.)
The system was then tweaked to perform scaling on the number of people, and to distribute points based on the amount of damage done per player (which coincidentally seems to be what OSI did). After several tweaks, simulation runs for 1-20 people doing equal damage with luck levels of 0-2000 showed similar chances as the old system. (In fact, a
little tiny bit higher, but not noticeably.) This, with the added bonus of regular artifact drops, and preventing any devaluation of the artifacts, is why the system ultimately got implemented like this.