I don't think having any type of measure so young would be very reliable.

I can say that my youngest Dd was just tested (4.5) with the WPPSI. She has always had a very advanced vocabulary. I knew she was speaking like a much older child when she was 1 and 2 and 3....

However, in waiting a bit more, we got a more comprehensive picture. In fact, 4.5 is still very young; we only tested at this age for school admissions.

Would you do anything different if you knew she was gifted or HG?