Working mostly for B2B clients at our agency, I still face the occasional doubt about the relevance of our medium in advertising and more important, lead generation. (Folks in the US, this might come as somewhat as a surprise to you, but this still is the case quite often, when our clients discuss where to spend their budgets)
Here and now I found a link that supports my argumentation that online works in B2B. I had found others in the past, but my blog is only a few days old, and I am too lazy to search for these artivles now.
It’s at eMARKET (german site).