I don't think NLN is to blame for the UFC debacleFrom what I read, it was the authenticating system hosted on UFC.tv that caused the problem.
To be fair, the authenticating system was made by Neulion. However, UFC.tv (the web service hosting the auth sys) was not build to handle the large load of authentication requests.
I understand why Dana accused Neulion though. This is a technically complex issue. So, most people won't be able to understand the root of the problem. Consequently, it's easy for Dana to shift blame on NLN to protect his own brand.
Again, I'm not an expert on this. This is just based on articles/analysis that I read.
TL;DR Neulion was equiped to handle the streaming but UFC.tv did not stress test their own infrastructure.