I would say advanced.....it definitly shows a different way of thinking that most kids do not have at that age. Counting to 20 is advaced for a 39 month old. My DD 2.5 can count to 25 and her ped said normal for 3 is counting to 5, although some can count to 10.

I never know what is normal LOL

DD6- DYS
Homeschooling on a remote island at the edge of the world.