I am not sure we differ in any more than degree. I agree even in the 20th century the media made mistakes and there were even outright frauds that went on for a while within my memory (Stephen Glass, Jayson Blair, and so on).
I mainly wanted to call attention to how online outlets are so focused on headlines and clicks they have even less incentive than the past to be truthful or curate a reputation for accuracy.
When your views depend not on a base of weekly subscribers or businesses advertising in the classifieds, but on how viral your story is and how many ad impressions it can get, the truth suffers even more than it used to.
Can information be suppressed as easily now? No, as you point out the primary sources of information are far more widely disseminated than they ever have been in the past (e.g. all the videos from both sides coming out of the Syrian civil war thanks to cell phones and YouTube). But if people are still trusting in secondary sources and don’t check the primary source when it’s available, that doesn’t help as much as it could.