Talk show hosts don't speak too fast; they articulate their words so that their audience can follow them. They avoid mumbling, keeping their speech nice and clear, with varying tones to keep listeners engaged. They also incorporate a bit of humor and use clear, audience-friendly language. To achieve that pace, they practice a lot by shadowing and initially controlling their vocal cords. With training, this becomes automatic.

There is a saying in English: "Practice makes perfect." You just need to keep practising until it comes naturally. Then it can also come fast if you want.