I have noticed for a long while that: people (either inside my company or across the whole software industry) think if a people is a C++ expert, it could be easy (and likely) for him to be an expert of other not-that-hard-to-be-expert-of things (such as, VB, SQL, Web, Script or even C#); however, people tend to believe (more or less) that an expert of those not-that-hard-to-be-expert-of things are less likely to be a C++ or Operation System expert.

I think such kind of viewpoint is popular, but not of truth.

//shrug