This is a bit better as it gives distribution.

http://www.babycenter.com/milestone-charts-birth-to-age-3

I think the best advice given on this board ( and by our Ped ) is to throw the charts away. We've stopped recording milestones.

And yes, a lot of ND kids fit right on the published scale. Mr W plays with 2-4 year olds a lot and they seem to fit the charts. Mr W just learns so much faster than they do.