Huh, DD was also very alert right after birth. As was seen by her screaming at me for 2 days in the hospital and not sleeping one bit! She also had great head control and I remember thinking it was funny that I had seen newborns on TV whose neck couldn't hold up their heads. Also, I can't remember a time when she couldn't hold up her head when lying on her stomach.
I know my parents said I was also extremely alert as a newborn. DH on the other hand apparently slept all the time! No clue about his head control, though, but I'd wager it was pretty good since he was very early with his gross motor skills.