10 km Eggs
I don't hatch a lot of eggs, but in the first months of the game for every 15 eggs collected at least one was 10 km. In the stardust event I finally bought some incubators and hatched probably around 50 eggs, at least 40 of then 5 km, none 10. Are the 10 km eggs really harder to find then it was, or I was just lucky on the past?
Answers
I think on average you'll find a 10km 1 out of 17 times? The probability is listed either here on this site, or on Silphroad, I don't remember.
I noticed getting 10km eggs often though, so I started keeping track. During the past two months, I've gotten 10km eggs with a ratio of 1 to 8. I guess I'm just lucky - or not, as I have yet to hatch anything good. Currently on a Magmar streak of 4.
I usually get 10ks around the same time. Like 15-20 5ks and 2ks then 3 or 4 10ks all back to back(or close to it).
Also I haven't found the hatching percentages accurate at all. Not even close. As others have posted, it should be almost impossible to hatch the same mon 3-4 times in a row, but it happens often.
My 10K have also come in bunches. I've seen 9 so far, 7 of which I got early on, then nothing for two months or so, then two back-to-back. Right now I've had nothing but 5K eggs for two weeks or so. My 10K ratio is 9/130 or 1/14.4
I also have gotten a lot of Nidoran males out of my 5K eggs. I do wonder though whether the Pokestop you get them at makes a difference - I'm in the burbs and have a limited selection of stops I hit on a regular basis.
I used to get them all the time but since they started the events I've found it difficult to get any. I got one at the start of this event and one at the end.
But I prefer it this way actually 10km are super disappointing. You either get crap or you get good stuff but with missmatched movesets and lower IV's.
I hatched 288 Eggs in total. I guess about 16 of them were 10km Eggs. Once I got a Dratini with bad stats. Also to mention are my 3 Snorlax with Lick/Hyperbeam which hatched shortly one after another. I guess I was kind of lucky those days.
Buy the way, what do YOU think: shall I level my 3rd Snorlax with (only) lV 80%, or would you wait for another Snorlax with a better move set?