Hi johan,
I think what had happened is that the dilutions at one point might have reached 1 on 3, but were found to be too strong, so backing off they stabalised to something less than 1 on 20.
We have seen here too with some of our people, that they seem to find that they can double up, or push the strengths, but fairly quickly (and maybe not always in one or two applications, but over a little more time) they have to back off. Sometimes, not only because the wheal increases, but becasue POIS symptoms as a result of the ijections seem to worsen.
I'd have to re-read the papers, but it seems by our experience, that this is what is happening.
I think though, that those few who are doing the desensitizations thorugh a doctor, are finding however that the increases in strengths are moving faster than originally thought by Dr. Waldinger.
The papers only deal with two cases, so are very preliminary. We here among members probably have more results than those, although these are mostly still "in progress".
Admittedly it is still a little proven method.