This is my opinion, but reading from the beginning of the thread i think your seeing 70-80% of people seeing something. Which is somewhat consistent with the studies. Again and its still early.
I'm not going to deny with needling some people's response could be super slow. However i truly believe with needling we'll be able to maintain all the hair we gain because we are attacking part of the root problem. If i told you you'd be able to gain half a norwood a year through needling, yes the progress would be painstakingly slow. However if i was able to maintain that regrowth it'd be a home run.
And again at the very least even in extreme non responders..... why not continue to needle at least once a month for a couple of years. The purpose of needling is to push growth factors. To push the follice to make a hair. To me even small regrowth at 3-4 months is impressive.....again if we can keep the hair we gain.
The thing is that the studies report 100% of people are responders. In my opinion, it is far from consistent with the 70%ish we are seeing here. Anyway, we should really compile all the data into charts and tables to infer the real percentage of responders of this trial.