We're still working with 18-22 year olds. Texas doesn't have upperclassmen with winning resumes who could educate the youngsters. There's a good chance that they thought the hard work was done after OU, and lost a little focus.
Between Alabama, Tech, OU, and ISU, this team is showing me they're as good as they want to be. Ideally, they'll internalize the notion that they practice against their own standard, and play games against their own expectations. That's a feature of mature winners. It's hard to skip that painful step.