I have a dd5 with vci wpssi 99th percentile, and her speech has always distinguished her. From the age of 1 she was using full sentences (not all the time, of course, but capable). By end of yr 2, she was speaking like a 4 or 5 year old. For her, anyway, her vocabulary, grammar and even the way she was able to correctly pronounce words much larger than most kids her age was pretty distinct. Also, in paragraphs rather than sentences at that point.
Most of the 5 year olds we know still have some letter sounds they are still working on, from what I can hear. They are also still very much learning the rules on things like 'I shot' instead of 'I shooted'.
I think 'L' is the only sounds she's still a bit lisp-y on, and frankly I even think that is because she's been at school and picked it up there. There are days when she sounds more like her classmates, but lately this summer she is more back to her regular speech because she's been picking up at home again.
Part of the reason I noticed her speech early on, is that our son, identified gifted in l.a., would speak in complex sentences pretty early, but I was the only one who could usually understand him. He was pretty normal with development of all the physical bits to make the various sounds.
