The difference between a prepared candidate and an unprepared one is obvious within 30 seconds

Every interview I run, I can tell within the first answer whether someone practiced out loud or just thought about their answers.

Practiced candidates answer in 60 to 90 seconds with a clear structure. Unpracticed candidates ramble for three minutes, backtrack twice, and end with 'does that make sense?'

The content quality is often the same. The delivery gap is what separates them. Five spoken repetitions of your top three stories changes the outcome more than ten hours of silent prep.

Say it out loud. Record yourself. Time it. That's the whole trick.