Okay, I'm sorry OP to burst your bubble, but no, in no way has he changed. He is still shouting and putting you down. Yes, it is less than before, yes it is a small improvement - perhaps, when compared to his previous behaviour, it feels like a massive improvement, however, this is not something that can change gradually and make small improvements over time. This is really hard to accept! When you see someone you love "trying" and appearing to make progress towards a goal that you want for them, it's natural to want to react positively towards that - but this is not appropriate with abusive relationships.
The problem is that it isn't his behaviour or way of expressing his anger/frustration/whatever which is wrong. The problem is that he is getting angry and frustrated about things which are not reasonable to get angry about. Abuse is about control, it always is - it doesn't matter if he hits you or not, shouts or not, explicitly tells you you can't do this or you must do that, or not. The problem is that he thinks he has the right to control you, the shouting (verbal abuse) is the result of this. The shouting might have reduced, but he's still shouting, ie, he is still trying to control you. He still thinks he has that right.
Your last sentence of the OP - those are his words, right? They sound like something that would come out of the mouth of an abuser, especially one who doesn't fully trust that you've come back and relaxed into the relationship again, ie, hasn't let his guard down and relaxed.
Think about it - how much can somebody fundamentally change their personality and expectations of life in 3 days? How can they suddenly be happy in a "normal", equal relationship when 3 days before they were enjoying being top dog and ensuring that they kept that position by enforcing it with fear and control?