Just bought a TT and don't have a TV for it yet. One friend, who tows a lot of heavy things, recommends nothing less than 3/4 ton P/U. A mechanic friend, who we will be camping with, says his 1/2 to...
I think that if you need a 3/4 ton truck (or larger) to safely tow your rig then it doesn't matter if it takes a few more feet to stop when you're not towing. The grey matter between your ears should tell you when to apply the brakes so you don't hit that van in front of you.