You are right that our team prefers C# over VB, but this is just team preference. I don't think that you can throw away Sitefinity because of that - after all, you can still use VB for your custom development of widgets and modules.
To answer your question on the examples, up to now we were first trying to produce nice documentation that can answer most of the questions of our customers. We are really looking forward to produce VB examples out of the C# ones. First we will start with the examples in the SDK, then we will continue with those in the Developers Guide.
For the time being, I suggest you using our Code Converter - http://converter.telerik.com/. It's not a perfect solution, but it still better than nothing.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items