Mine has, I continued with some driving lessons for him even though I had very little intention to buy a cart and continue, I was just desperate for something to do with him. He is ridden both bitted and bitless, but is more responsive bitless we discovered when put to the trap.
Thats interesting..
My Driving Instructor, butchered a driving bridle she had (blinkered) and we made one up, he went fantastically in it. Have tried driving with an unblinkered bridle and he was ok, but was a lot more confident blinkered. So we did a bit with him around the forest in a bitless blinkered bridle but as I say it was my instructors, I wish had the time and some where to store a cart as I would have definately followed it up, my horses LOVES driving and goes so much nicer than under saddle - says a lot about my riding I think (!) !!