What do you use as a definition for profoundly gifted?
On this Davidson press kit page, I see IQ > 145 is called PG:
http://presskit.ditd.org/Davidson_Institute_Press_Kit/ditd_IQ_and_Educational_Needs.html But, they don't state on which test.
On this Hoagies page (
http://www.hoagiesgifted.org/highly_profoundly.htm), I see WISC-IV of 152-160 is PG.
Many of the books I've seen about giftedness seem to include IQ scores from older tests (like SB-LM, which has a much higher range) that are unavailable now.
Current tests, like the WISC-IV and SB-V, have different scales than older tests and don't give such high scores, and so older IQ ranges don't really fit for currently used tests.
A school district in my city has a program that they describe as being for highly and profoundly gifted kids. To apply, a kid must have an IQ of 140+ OR score 97% or higher in at least 2 areas (assumably on the CoGAT).