What do you think, does this make sense?
Yes, very good. I saw your other topic but didn't bother to reply. The reasoning you've given here should have been the first response in your other topic. I guess those people aren't experienced with such time controls.
I started a thread recently about my grade being much higher at 3+0 than at 2+1:
https://www.chess.com/forum/view/livechess/my-grade-is-much-higher-at-3-0-than-2-1
I have been thinking about this a lot and now have an answer I am happy with. It's because my mental attitude is “don't lose on time” rather than “play to win”. I win a good proportion of my 3+0 games on time but such wins happen much less frequently at 2+1 because my opponents have that extra second per move, regardless of how long the game is. This is, I think, the main cause of my much lower grade for 2+1.
Another effect of that “don't lose on time” attitude is that the games become more reactive and tactical rather than strategically planned. So, I intend to try and focus more on playing a strategy to win the game rather than just to not make any bad moves more quickly than my opponent does. In the long term this must make me a better player and, as a result, my grade at both time controls should improve.
What do you think, does this make sense?