I have noticed the timer seems to vary widely in our games often feeling like the other team gets boosts.
So I just timed my friends game and at the start they got around 1 tick % per second. Then it increased to 1 tick per 2 seconds as timed by me. I physically watched the timer change.
I did not realize this was a mechanic? I was trying to read about it but find nothing. It seems odd that a game mode with a ticker would not have consistent timing. Is this a mechanic I just never noticed or is something going on with server tickrate because often I feel like from game to game my aim on the same hero can go from perfect to missing and my DVA ults almost stutter.