Ah... the smoothing code has nothing to do with FPS or optimization... Smoothing code deals with what you "see" on your end when the enema changes direction on his end.
What Zazen is referring too is that fact that now when you force an overshoot, and the enemy is in front of you, they cant take advantage of the old smoothing code to stick stir their way out of trouble.
Now stick stirring accomplishes what it should accomplish, which is to slow the plane down for a pursuing aircraft. Before this patch you were lucky to hit someone on the overshoot as the constant changes in direction were viewed on your front end as "unnatural" at best.
What you will see, and I beleive this has already proved itself out, is the better pilots (acm-wise) will be racking up all those "missed" kills, and the gamey pilots (stick stirrering non acm types) will be dieing a whole lot more. The game overall has become much more satisfying to me, as I am getting the shots I've earned through out-flying the opponents.
Balsy