5mg of dianabol then is the same as 5mg of dianabol now. There is no secret ingredient that Ziegler put in there. The only difference is that what we get now is from underground labs which can underdose pretty heavily without you knowing.
The only way you can accurately judge effectiveness is by testing the dose of the active ingredient in the caps/pills/tabs which requires a chemical assay.
There are still people out there who recommend DBol only for a first cycle. most seem to be in about the 6-10 week range at a dose of about 50mg/d...some piramid the dose, others just run the same dose the whole way through. I am sure it works fine.
It is really too bad AAS aren't legal because this is part of the problem with all of us geting gear from the underground labs...who the fuck knows what they are going to get or what concentration because you are just going on faith in your UGL that it has what it says. That is unless you are making it yourself.