Runners are so sweet though... Anyway, it really depends on how you handle the ducklings and their individual personalities. For examples, my two rouens, Mabel and Dipper, have very different personalities. They had the same amount of handling as babies, and Mabel still enjoys a pet or two if she is laying down, loves being sang and talked to, and will eat out of my hand. But being picked up? Out of the question. Dipper on the other hand will leave the safety of the flock just to run up to me. He also will hop in my lap and let me snuggle him. He once actually climbed in my shirt while I was laying on my tummy in the grass, reading. When I do this, he also loves to lay on my butt or back and preen my hair. Also, my khaki campbell girls, Wendy and Amethyst like to join Dipper if he is laying on my back and will snuggle up on my legs. They also occasionally crawl into my lap for pets, but not as often as Dipper.
BTW, since they are just a few months old (got them May 20th when they were a week old), I don't know for sure about their genders, and their names reflect what we tentatively think they are. Also, drakes are known to be quieter and a bit more snuggly, as the females can get nippy. It all depends on the bird though.