Yes it does, when regulating a Watch they test in various positions i.e. face up, face down, crown up, crown down and face vertical. They need to get a balance that provides the most accurate setting as an average across the different positions.
This gives rise to a term called Self-Regulation. The best way to test your watch is at night, make sure the watch is fully wound, as testing with different tensions of the mainspring will affect accuracy. Sync with your iPhone (which syncs with the internet), then place the watch in the first position, for example crown up, leave all night and dont touch or move it. Check in the morning against your iPhone and note how many seconds the watch deviated, i.e. lost or gained. Do the same the next night changing the position, and so on. I normally only do 4 positions of face up, face down, crown up, crown down.
Now comes the fun part! Up until now it's purely research.
Once you are aware in which positions your timepiece gains or loses time and by what degree, you can simply check you Watch at night against your iPhone. If it's running 2 seconds fast and you know it will lose 2 seconds placing it crown down, you place it in that position and come the morning, voila, your watch is bang on time.
That, my friends, is self-regulation!