This is an interesting topic. I wonder about this as well. With my DS4.5, it was clear early on that he was gifted (of course I was a little slow to figure it out because he was my first and I wasn't really familiar with the whole term 'gifted') But he was speaking in short sentences at 12 months, knew his abc's, colors, shapes at 15 months and was reading at 19 months. It just progressed from there. He is clearly HG+. I have a DD19mo who is quite different. She barely spoke at 17 months and within the last 2 months she started talking a lot. she just recently started counting to 10, she seems to know some colors, her shapes, and a few letters and numbers. But she is not at all as intense as DS was. DS was very into computers at her age, very into numbers, shapes, colors, and letters. She is quite interesting and funny and has a great personality. She appears advanced to me, but again very different. So while I do think she is advanced, I don't think she is anywhere near as advanced as he is. Although I am aware that it presents differently and only time will tell.