Now, the sci-ence comic isn't that big a deal - They're a comic; they're allowed to make snarky comics about such things. But really, Verge, 256 comments, many of them vitriolic? Yes, comic sans is slightly whimsical. But it is also easy to read, is widely available, and starts with 'c', so it's near the top of the list of fonts you need to scroll through to find a font. I haven't heard of CERN science teams submitting research to journals using comic sans. Nor has there been a ruckus raised over their use of comic sans for their press releases. No, the only time they used comic sans was in their presentation to an auditorium of people who worked on the project. They were jubilant, and can be forgiven for feeling slightly whimsical.
Or maybe they just wanted something that was easy to read. This was being presented to a fairly large crowd, with a video feed to the internet. Legibility may have been an important factor. Or maybe the creator of the slides wasn't concerned too much with the font, and went with the first one they liked.
This whole thing seems rather shallow. "Oh my!" cries the internet, "the particular shape of these perfectly readable letters is not to my aesthetic satisfaction! Quick, we must write about this absurdity, for that is far more important than what those scientists were actually talking about!" Apparently form is everything and content is nothing. Image far outweighs substance.