Update:
I got a response from the Eides which indicated that gains are gains and tend to be retained. I also looked into data on LiPS, which while it's a different program, does work on a short & intense protocol (60 hours in a month). The LiPS data seem strong for short-term gains and borderline and ambiguous about lasting gains. The Eides pointed me to an article they'd written about integrated the remediation into writing which was way off the mark. DD's issues are not fine motor.
I called the psychologist that did DD's neuropsych exam who called around to a reading specialist he works with. Both agree that they would be cautious and careful that the gains are monitored and supported through the time we see DD use the skills in her written work. They have requested her scores from Wilson to analyze the results, and he's suggested doing another round on the WIAT testing once we hit the 1-year mark from her last one, which would get us results directly comparable to each other from pre- and post- intervention. I'll need to weigh this testing against the amount of stress these tests seem to impose on DD. We'll likely follow through, however, if the school won't bridge the intervention to something that continues reinforcing these gains.
