I finally towed my Tundra and I am really happy with my decision on buying this truck! It really was a night and day difference from my dads 2001 Tahoe with the 5.3! One of the biggest things that I noticed was how well the Tundra stopped compared to the Tahoe. The brakes on this truck are big.
A few other things...
1. Ride - the ride while towing was a lot smoother then with the Tahoe. The soft suspension on the Tahoe (no auto-ride) really made it bounce while towing. I didn't notice any bounce while towing with the Tundra. It also didn't get pushed around while cornering and braking.
2. Power - With almost 100 extra HP and ft/lbs. of torque the Tundra has almost 25% more power then the Tahoe. On paper these numbers looked great and I was really hoping they would be noticeable on the street...and they are! I had no problem accelerating quickly or climbing hills. The Tundra has lots of power, but I have a feeling it's going to gulp gas when the boats in tow
3. Shifting - The 6 speed transmission and 4.3 rear end did a great job of moving around 6k pounds of boat and trailer. Unlike the Tahoe which would constantly shift for gears and down shift on any hill, the Tundra didn't have any of these problems.
On the way home I left the rear sacks nearly full (750's) to simulate having the weight of camping gear and people, and I couldn't notice a difference. Overall I am super happy with the trucks performance! Don't get me wrong, the Tahoe is a great rig and has served us well for many years. The Tundra is just more built for towing a 23ft. boat. We will probably still use the Tahoe for short trips, but for any long distance towing my parents will be borrowing my truck...oh how the tables have turned lol