On Tuesday, 10 September 2013 at 18:42:16 UTC, Jonathan M Davis wrote:
> What seemed to have convinced Walter was this interview
>
> http://www.artima.com/intv/nonvirtualP.html
>
> where the focus was on code maintainability and how C#'s approach to
> virtuality supported code versioning. However, most of the rest of the
> discussion and what most everyone else was looking for had to do with speed by
> default.

Yes, and the core of the case made in that interview was the second of the arguments I cited, though in the interview it was made in more detail and more carefully argued.