He confessed that the show was a gamble, and waiting for news of the ratings when the show started against Britain's Got Talent was a 'nerve-racking' experience.
Fortunately the new weekend reality series launched with 8 million viewers last month, and has grown every week to peak with close to 11 million last Saturday.
"I don't think you could do a show on the BBC where people were being laughed at and humiliated," he said this week.
The Beeb boss added: "The combination of the warmer tone and the fact it's focused on talent rather than that comedy aspect was the reason I thought it had a chance of working on BBC One."
The success of the show will also see it air on Sunday's from this weekend forward, with a 30 minute results show airing from 7:30PM.