I think that the new extended scoring systems on the WISC-IV and SB5 make this less of an issue
I'm waiting for more knowledgeable folks to chime in, but I'm not sure that's the case. My understanding was that the problem is that there aren't enough questions at high levels (or high enough levels) so that an older child has to answer with near perfect accuracy in order to get a high score. There is very little margin for error. I don't think extended scoring would have any impact, since the fact that more 10-year-olds can answer the questions correctly is going to mean a lower scaled score and extended scoring won't kick in unless you get a 19 (I think).
