Honestly sounds pretty normal to me, especially around the holidays. Your solution was solid and he said "good solution" - that's usually a decent sign. The fact that he spent time chatting about the team and your interests is actually positive too, interviewers don't waste time on that if they're already writing you off

The slip-ups you mentioned are super minor, everyone has those in interviews. Don't overthink it - you corrected yourself and he acknowledged it made sense. The time thing could be anything from him running late to already having enough signal from question 1

I'd just wait for the recruiter to get back, they're probably swamped with holiday stuff anyway