We've never had the SB-LM, but I found the Gross book very useful for comparison purposes just with the achievement/aptitude type testing given on all of the case files (I think I'm thinking of the right book?) I don't think there is enough tangible evidence out there to really compare then to now as far as IQ scores. If you look at some of Gross's kids and Ruf's kids as well, you'll likely see that IQ is not the only quantifiable measurement, and achievement data almost always clarifies the picture. This is very valid even today, and my own data shows the same trends. To compare, look at the full package,
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