This fits well.
My friend caught 5 in a row, then none for 40 remaining spawns on the event.
I caught one on the 6th one, then had a gap of 80 and 2h30 before another.

Highly doubt this, had people travel 30+ miles to my town and they get 3-5 shinies and I got 9… also never seems to w9rk for youtubers

whyd how would niantic code for this? It offers no benefit to them or the players and how would they track each players start location and distance travelled? Would you have to have logged in before you got to your location for this to work?

Can we see the data too? I’m more than capable and happy to run statistical tests to see if it significant

I doubt it is significant.
In saying that,
Dratini, 5/5, right had 30 mins, left had 3 hours, right travelled 5 miles, left travelled 0,2mi.
Mareep, 5/6 right had an hour, left had 3 hours, right travelled 6,7 miles, left travelled 0,5mi.
Charmander 2/5 right had 25 mins, left had 3 hours, right travelled 10,1 miles, left travelled 0,05 miles.

As i said, i doubt it is significant, but in looking at that, it may be evidence for the idea of early shinies.

Notably each time we were in the same place catching every event pokemon.

No wrong. The tren is defiantly more in first hour. I inwos one one all events about 8 first hour 1 after I have same trend so do nearly everyone else in my group

For Shiny Charmander, I caught one in the first half hour, then nothing for the next hour and a half, then caught three in the last hour. Four shinies out of 126 seen, so about 3%.

Nah, me and 4 friends all walked the same distance for the same time and caught the same amount of charmander, yet we all got varying amounts of shinies

I think that is just a conincidence, there are always 4 of us for each community day and we do the full 3 hours. We all end up with about 4/5 shinies each on average where we live, however on the Mareep day my partner thought he wasn’t going to get one at all and only managed to get one about 2 hours in whereas the rest of us got the usual amount.