I remember them discussing a book (Interesting Times, I think). Mark Lawson and Mark Kermode or Tony Parsons (I can't remember which) thought it was funny, and Tom Paulin and Allison Pearson didn't. No surprise on the split of the panel. (However, when Mark Lawson referred to Truckle the Uncivil's walking sticks that said LOVE and HATE, Allison Pearson laughed and Kermode/Parsons called her out on it, implying that she just wouldn't admit that she found it funny.). I remember Allison Pearson complaining about the cliched language structure Pratchett used, missing the whole point that he was writing about a bunch of old heroes so would have been parodying fantasy prose.
Anyway, I enjoyed Discworld as a teenager and young adult, and the reason I stopped reading them was because I stopped reading fiction.