"Does travelling over a certain speed make Pokemon instantly flee?"

#PokemonGO: I've seen posts of people saying don't use incense while driving because it makes pokemon instantly flee. But I wanted to get more details about this due to recent experiences of mine.I like to use tracking maps to find good IV pokemon near me so I can drive and catch them. I don't ever spoof or use anything else to alter my gameplay. I'm always there physically so when there is a good pokemon that is lucky enough to spawn near me, I always try to get it.Recent experiences has had me having a Charizard flee away from me from my first ultra ball + razz berry curve ball throw as well as a Lapras.It got me thinking is it because I was driving to the location that it flees away this often? Note I always park and catch, never catch while driving which is stupid. But I usually have my pogo open while I drive there so it may register some distance if I'm lucky.Do you think it's because I had pogo open and even though I parked to try catch a pokemon it thought I was travelling too fast and it flees? Or is it just dumb RNG?I definitely had lucky times where a pokemon would be caught in one go (specifically Laprases or Snorlax that has a high catch rate) but I also remember the bad times where things flee after one ball. via /r/TheSilphRoad http://ift.tt/2rDUcTv