10000000000000000% disagree that the culture is changing slowly. It changed. This is a different team culture than what we went into last year with.
I think @PerreaultForever's concept of culture includes not just the attitude of trying to be better, but also an attitude of expecting to win every game. I think both are aspects of culture, and compared to the Jack years of cliquey locker rooms, the culture has clearly changed, but while the relationships are better, @PerreaultForever also wants to see that firm belief that they can win every game before he calls the culture change complete.
I think they "hope" to win every game, but don't "expect" to win every game at this point, or if they expect to win, that expectation is still pretty fragile.
So in a way I agree with both of you: The culture has clearly changed, but it's still a work in progress, subject to setbacks, and far from complete.