The post is quiet good but I think that part seems the weakest. But I'd like to hear other opinions.
OP seems convinced but I'm not sure. He didn't mention Boolberry in the web hosting stuff and just looking at the web site I would guess that it did not come from the same coin mill. Furthermore it doesn't really fit the pattern of minor changes or no changes from the reference code that characterizes the rest of the crop.
Personally I found it interesting that crypto_zoidberg knew exactly what he wanted to change and how to do it within just a few weeks of the first public disclosure of the code. On the surface that seems unlikely for an independent developer.
So at this point, to me, Boolberry is a bit of an outlier. It has some apparent connections, but not as many as the others.