Interesting thread! I never thought of my kids early physical milestones as signs of giftedness. A lot of people thought I was pushing them (especially when they learned my kids were out of diapers before their 2nd birthday), but I don't think I did anything different from what other parents do. For example, when my kids pushed to a stand in my lap, I let them stand there as long as they wanted even though they were very young.
The things that surprised my most were the early pincer grasp and self-feeding at 5 months and "terrible twos" tantrums before 12 months.
I remember sitting at the kitchen table paying bills when my 15 month old came into the kitchen. Without even looking at me, he pushed a chair to the counter, climbed up, got a cup out of the cabinet, and then climbed down and put the cup on the floor. Then he did the same thing to the fridge, getting out the milk and chocolate syrup, then to the drawers to get a spoon. Without ever once looking at me, he sat on the floor and prepared himself a cup of chocolate milk. He drank it then went back to his room to play, leaving a mess on the floor and me staring at him dumbfounded.
One thing my kids were *not* early about was talking. I hear so much about gifted kids talking early, but my kids all spoke late. Two of them didn't speak until almost 2 years old and one didn't speak until almost 4 (however, this one could read as soon as he started talking).