I'm sad to report today that Adam is part of the 1%.
He's half an inch short of 3 foot tall, officially 2'11.5" or 90.2cm now that he's 18 months. I don't remember exactly what the doctor said, but something like 99.35%. If you look at the growth charts you'll see that he is currently the average height for a 27 month old!
Whoa! Wonder if you can use a formula to estimate height at full growth? I'm guessing he'll be taller than either of you. Dave is taller than both his mom and dad, so guess that's not too unusual.