Pokemon GO Egg Hatching Speed
Server Update Location Ping
Pokemon Go Servers Update Locations roughly every 1-2 Mins, and close to every 30 secs when changing direction.
So if you walk too fast to a location and then “back track” or walk back when the server has not updated your location. It will not award you for the entire distance you traveled. Instead, only for the distance, it calculated once the server updates your location.
Egg Hatching Speed Limit
10.5 mph, appears to be the maximum speed when Traveling In a Straight Line. You can speed up past 10.5 mph, when traveling in a circle or square routes.
Do Not Exceed This Speed Limit or you will lose distance traveled.