Our big guy is six months old...crazy. He jabbers like crazy, sits up unassisted, rolls easily from back to belly, loves all baby food and smiles at every stranger he comes in contact with!
He doesn't have a tooth yet but there are days he is clearly uncomfortable so I believe that first tooth will be popping up any day now.
Stats (6 months, 12 days):
Weight: 22.5 lbs
Height: 28.5 in
Head size: 18 in.
Still in the 95th percentile all around.