I’m probably the only one who cares, but the engineer in me has to verify these things.
Drafting: I joined a large 2.2 W/kg ride. I found if I dropped off the back of the pack I would immediately lose the draft. I had to go at 3+ W/kg to catch back up. Even if I only slightly lost the pack. I think some of the issue is the delay between when I would ease up and start pedaling again. But I had to go much harder than I would outside to catch back up. A large pack definitely seemed to have a drafting effect. Single drafting was much harder to tell if it did anything or not since there is no tactile feedback. I’ll assume it does something but since random riders never seem to maintain a constant pace it was hard to tell
Difficulty Slider : I did the Hilly Loop KOM three times. Once at 50%, once at Max, and once at Min. All three I tried to ride at 100% of FTP. Times were 3:20, 3:05, 3:09. I probably wasn’t warmed up for the first run, but it’s interesting that my fastest time was on Max. The main difference was as Zwift says, the gear that I was riding in. Min was really weird as I never shifted. Max felt more normal.
So with my quick and dirty “scientific analysis” I’m going to have to go with what Zwift says is accurate