Experiencing the same problem. Having the same setup (Saitek yoke/throttles and CH Products rudder pedals). I also operate the elevation trim with one of the rocker switches on the Saitek yoke and have a hard time to trim the plane, especially during start and landings when flying without the autopilot.
I find the plane as the best I have ever flown in FSX since it is a real challenge (at least for me) compared to most aircrafts that I have bought, including 737 from PMDG etc. But because of this "lag" it is sometime frustrating since output is far behind input and could potentially ruin a good landing, which I find to be a real challenge with this airplane anyway.
Torbjorn