Totally agree with above post. Pulled 10000 pound 5th wheel (scaled) for 2 years with a 2011 Tundra reg cab long box (1820 payload sticker) Was over GVWR by about 3-400 pounds. Traded for F-250 gas 6.2 due to payload. No difference in handling feel with 5th wheel between the two trucks. Like the ford trans better as can use M and it will not downshift out of the gear whereas tundra would. Tundra engine much more responsive and pulled hills better at lower rpm than the ford. Tundra got considerably better fuel mileage towing and non towing so I too wish Toyota would make a higher payload truck.
