2012 Taco 4.0 V6 Sport w/tow package (6500 rating) All else stock with exception to bars and bed cover. Pulled a '97 25' Crownline CR 250 Cruiser
Boat Wet (In this pic, but didn't know): 5900 lbs (Approximately)
Trailer (No brakes): 1200 lbs
Total tow: 7100 lbs
Total tow rating: 6500 lbs
Over/Under Capacity: 700 lbs over capacity
Only drove it about 35 miles with limited hills. The few hills I did encounter, you could tell a boat was behind us. Traveling on the expressway, we hardly felt anything at 60-65 mph. 70+ was a different matter. You felt the wind and bumps just a little bit more, but still drove smooth.
When we launched the boat, I had zero issues getting the trailer and boat in and out of the water. The Taco definitely sounded like she was working when pulling it out, but there was plenty left in her to pull more if needed. The shocking part was how well the front wheel disc brakes handled everything from drive to launch. Very solid braking for what I expected considering the brakes on the trailer were pulled off.
As an aside, I normally would never tow more than the rated tow capacity, but my buddy filled the boat without telling be beforehand. In a way, it's nice to know the truck can handle more if it needed to.
Hope this helps someone as much as this site has helped me! Thanks a ton guys/gals for all the info you put on here.