I respectfully disagree. I've run a Campy Shimano mix with a J-Tek on 3 different bikes for thousands of miles. No problem whatsoever. This is my set-up.

Campy Chorus Ergo 9 speed brifters
Campy Euclid frnt. dérailleur
Sugino XD 500 triple crank 48.36.24
Shimano XT M-750 rear dérailleur
12-34 Shimano XT cassette
J-Tek # 3 "shiftmate

I couldn't ask for better shifting, under load or not. Crisp, Smooth and noiseless.


Richard