Me neither, much. And not at all in the Obama era. But the extremism of that study stuck with me when I heard that. Especially since CNN, unlike MSNBC, purports to be unbiased and neutral. Fox certainly isn't perfect but in the coverage aspect on Trump, they actually are closer to being fair and balanced in their coverage of the negative and positive of Trump, if not the rhetoric of their more rabid cheerleaders. At least they have anchors that lean in both directions. I remember Fox back in the Dubya years, they REALLY sucked then.
I'd be interested to know what it was like during the Obama era. I'd think the numbers would be close to the same except refering to positive stories, but idk, wasn't paying attention.