10k egg drop rate
Answers
I got all 4 of my most recent, inc the 3 in a row, all from stops I always use.
P.S Dratini not a bad thing to get from 10k :)
P.P.S I had a real dry spell for 10ks eggs for ages, then wham, 3 in a row, so don't be too disheartened. I must mention that I had not bought any incubators for ages, and I bought 8 to get rid of all 5k eggs to make way for gen 2 hatches. I hatched all 8 5k at the same time and only had 1 left in incubation. This left space to pickup 8 more eggs and was when I got 3 10ks in a row. Perhaps try the same :)
I think the entire concept of there being a 2km/5km/10km drop rate is misleading. People seem to think there's one RNG to determine whether you get a 2/5/10km egg, and then a second RNG to determine which thing from the respective pool you get. I'm pretty sure there's just one distribution for how likely you are to get a given Pokemon from a stop, and then the chart determines how long you have to walk it before it's revealed/how much candy you get.