In a sentence

[Hornets222003]

I'm glad that you guys are having this discussion

Last season I had a play where A1 was dribbling, decided to cross over, but instead of crossing over with a dribble, he just changed hands with the ball (it was an intramural game so you can guess at the skill level of the player). During the changing of hands, B1 reached in and touched the ball, but it did not cause A1 to lose control of the ball. As soon as he took another dribble, I called the illegal dribble violation. He looked at me and said, "but he touched it."

Later I asked an official who was my senior if I had made the wrong call with the touch, and he said yes, "the dribble ends if the ball is touched by an opponent."

This post clarifies a lot for me, and lets me know that I made the right call originally.