Here is one kid I found on STUTT-L:
We did not have a strongly positive experience with the Lidcombe, but did try it for several months with my little boy, Steven, who had just turned 4 (he's now 4 1/2). Our little boy seemed to do well with it for about the first 6 weeks, but then after that began prolongations, blocking, and ingressive breathing. I knew those were not good signs, but did not get any assistance from Steven's clinician when I requested 'tools' to help him with these struggles. I have come away thinking Lidcombe is possibly helpful for children with mild stuttering.
Anyway, our clinician calculated the %'s and we did one rating for a full 24 hours. We just averaged his score---meaning we considered the best and then also the worst scores for the 24 hours.
We have many mixed feelings about Lidcombe (as I think many other parents and clinicians do, too). We are now pursuing a more traditional approach--would be happy to talk with you more about it if you would like.