The teams having this much wild results is something we are definitely not that used to. Inter losing to Milan is something I could have seen, but I also expected them to win all the other games and they failed, which is why I think it's quite obvious that every team is doing just mediocre at best, everyone is so close to each other. Juventus looking good, Napoli definitely looking great.
Inter Milan losing to AC Milan was not too strange to me because both teams have a long history of winning each other since they both use the same stadium which is San Siro for their home matches. Don't even be surprised if Inter Milan win them back in the return leg. I agree with you that the league has not really shown any of the teams to be clearly serious about the title because I will not believe that Torino can win the league even though they are surprisingly at the top of the topic at the moment.
I honestly didn't expected Napoli to do this well because their move on Osimhen was a wrong one if you ask me and they should not brought in Lukaku and they should have put Osimhen there, it would have been better, or so I thought. Looking at how they are doing right now, we can say that maybe I was wrong and maybe, just maybe Conte knows about football more than me lol. Obviously we are so used to seeing managers not do that well and fail that I just automatically think that they made a mistake but turns out this time Conte knew what he was doing and that's a good thing.
I'm truly happy for Napoli as they have been able to organize them selves in the absence of Victor Osimhen who was their star player. Getting an away draw against Juventus is actually something to be proud, as well as sitting at the second position with.