This is probably the weakest a comic can be without getting a thumbs-down. The joke boils down to 'certain words sound British', which is obvious to anyone that knows anything about history. We speak English, which was developed (mostly) by the English, who also live in Britain....
That said, it is kind of amusing in a vague way to imagine towns named after Pokemon, and "BBC Channel 4" is actually a clever pun that could only have arisen though this specific joke. Plus, I asked Jon (Levi), with whom I do a podcast, for his thoughts about this comic, and he said it pissed him off! That's how you know a comic's good, when it pisses off the British.
I think most people will find at least one funny bit in this comic, even if as a whole it might leave them cold. It's still better than 'time is passing (again)' or 'im very smart with science' or...
This is set up like a parody of people, but no one in the history of ever has had this thought process. Even in a longform way that this comic just sums up. This comic parodies something that doesn't exist, which would give it a nifty dada quality if it was intentional.
And I'm not just being dumb! Explainxkcd has (at time of writing) like five different theories on what this comic could mean.
Also, who uses Facebook anymore? That exact question was asked two years ago on this very blog, the last time XKCD mentioned it.
Fuck yo shit, I can't even believe this shit. Have you seen this shit? Fuck, I just watched this shit. Fuck Jessie Heisenberg, man.