If anecdotes or perception don't count, anything less than a peer-reviewed article showing a statistical study on relative information fluxes (information volume per time unit) along different media is not going to serve.
So no, I don't have absolutely anything to back it up, except for my biased perception. I could word it a little differently, such as:
Given that one of today's main communication routes (regarding news and trends on technical affairs such as programming) among the newer generations are blogs...
Which I think would be more conservative than my previous statement, but still doesn't meet your requirements. It's still one person's view of things.