Since no one has responded, I thought I would give it a go myself. I ran the values from Nordtvedt through Ysearch using the usual R1b standard values for the additional markers. Though the vast majority of matches had not been deep clade tested, I found 3 P312*, 2 L21 and one U152/L2 amongst the results (assuming the self reported subclades are accurate). Only one of these was Scandinavian, Eriksson, confirmed P312* from Sweden.
There are at least 3 different subclades being involved that are in the 3000-6000 years of age. The implication to me is that this north-south cluster includes a lot of "convergence" or people that are not that closely related.
It sounds like the true subclade is a subset of the P312* paragroup.
Of the confirmed L21* folks I have identified, I couldn't find any with this exact pattern. That worries me a bit. Either I'm missing something or some people mark themselves as "R1b1b2a1b5*" in Ysearch when they are just guessing. Of course, "R1b1b2a1b5 (tested)" shows up when FTDNA data is linked.