>>9
Nonsense. The best way to prove to co-workers that you are incompetent is to actually be incompetent - and that can be done using VB.NET or C# or anything. Conversely, if you have programming skill then VB.NET will not be a hinderance in expressing it.
I do agree with your assertion that VB users are generally not as skilled in the art though. But our elite crack squad of programmers in /prog/ obviously do not fall in to that category.