yes, I belong to the mtv generation, we have a muuuch longer atention span.
As a quick aside: For me twitter is not so much a social network as a social news channel. Ipad > flipboard > great experience.
Is it possible that your potential clients do not always read more than a 140 chars? The ability to read 140 chars does not exclude you from being able to read a thesis.
What about linkedin? Or other more professional orientated social networks?
There just tools to comunicate with. And communicate different things than what you are already doing on your own site.
my 2 cents worth.