Yet another layer of indirection

I have been using .NET 4 for a while now but I have to admit I never thought well of optional arguments. My impressions gravitated between

Yesterday, I bumped into an article that mentions a report published by a supposedly reputed analysis firm (and I wonder what sort of company that is, anyway) in which data from a study is interpreted, implying a conclusion which does not leave “Agile” is a good position.