I can't say no, because their performance is good in this pre-season match, but I agree that we have to lower our expectations of them. Pre-season matches are unpredictable matches, I mean sometimes they are good in pre-season but not in the competition, and there are also the opposite, they are bad in pre-season but they are good in the competition.
Now it is AC Milan's job to answer all of that, they have to answer that their performance in pre-season is a true picture of their performance in the competition. And the answer we will only get when Serie A starts. We have to be patient first to see their performance in Serie A or other official competitions.
Well done, I absolutely think like you, the performances are good now but we shouldn't expect who knows what, friendly matches are one thing, serious matches are another thing, the ones that the championship puts before you with opponents who want to win. So we will see the real performance during the championship.
Milan managed to beat Manchester City, Real Madrid and Barcelona but unfortunately, these good results only occurred in friendly matches. I am sure if it is an official competition, then it is very unlikely that Milan will be able to win streak with such opponents. After all, the fact is that in the first friendly match played by Milan, in fact Milan was also defeated by AS Roma with a score of 5-2. Thus, at least there are still bad results experienced by Milan in these pre-season matches.
But still, I personally really don't care about the results that occur in pre-season matches like this because after all, they also don't play properly or don't play when they play in official matches. But indeed, at least with the good results they managed to get in pre-season matches like this, at least the good results they got could be a motivation and or increase their enthusiasm to start the new season later.