my '11 F250 6.7L Ford SMOKES every manual transmission for towing, climbing, engine-braking, etc, etc, etc. .
If by SMOKES you mean out runs it on a short hill, you may be correct. Pull 20K up a 40 mile grade and your AT will overheat and hate you enough to quit. When it comes to maintenance, I put a clutch in every 350K, you rebuild every 100K.