He says thing passionately, but that was never the point of the original stories (because none of them were radio dramas, you read them to yourself, so they had your voice and your passion for the subject matter). The stories used arcane words and old world spelling to evoke things that were both old and alien to our usual perceptions. This lacks words like ungula, colour, and caudate, rather than claw, color, and amphibious/frog-like.
And what is more, the joke got thin at about 4:30. I skipped to the 10:00 mark to see when the punchline was coming, and it was okay, but it was such a long time coming... That's what she said.