Steve, I suspect that one issue with this "problem" stems from the fact that many people get their development numbers from a chart. With this approach, I'm not surprised that there are comments about pyro being difficult to print with. With the selection of films, papers and variables involved, it stands to reason that not testing materials is a possible cause of these comments.
I had this type of comment about Efke 25 and ABC pyro, and ended up corresponding about it off list last year. It turns out that the film development figures being used to print were given by a friend and were intended for the Van Dyke process.
I think a bit of time spent in testing would have helped to prevent the problem. It would be curious to see how many of these comments stem from a lack of thorough testing.