I wouldn't say 'hard', but absolutely harder than I would've imagined on the most milquetoast of networks. Bodes well for the future.
That's also how I feel. The way Jeb answered that last question, Colbert could have torn him apart. He didn't sit there and let Jeb advertise himself though. Overall, between that interview and the Trump segment, I'm really happy about how the show is turning out.
Colbert was always going to be funny, there was never any doubt. The question was if he was still going to be important, and the first show bodes well.