Got a phone call back from CSG to schedule an interview.. I haven't called them back yet because other people were tagging around me and refused to move on. From what I heard the phone interview was a bit jank and so was the personal interview.

When you are asking questions about extreme efficiency in .NET (rewriting library defined functions to squeeze some fraction of a millesecond out) and manipulating the garbage collector you are probably too far into deep waters to be saved. Somewhat spooky.. but I shall trudge forward.