I've been wondering the same thing lately about my DS, too! But I don't want to look like I'm complaining, because I'm definitely not, just curious...
This is DS' usual sleep pattern:
Bed around 8pm
Bottle in bed at 6am, then straight back to sleep
Up for the day at 9:30/10am
Arvo nap at 1:30 through to 4:30
Back to bed at 8pm

So it sounds as if both our munchkins are sleeping roughly the same amount of time in a 24h period. And my DS is 150% on the go when he is awake as well. Never ever sits still to do something, he's happier walking around while he eats rather than sitting in the high-chair cos he has so much to do! Climbing, running, dancing, wriggling under furniture. Anything but sitting still!

My MCHN appt is in 2 weeks, so I'll check in with her, but I think it's all totally normal and fine, and we are one of the lucky few parents with fantastic sleepers! Woohoo!