My thoughts too. We can't say that because Inter beat Torino 5-0, they are on course to win the scudetto this time around. Who knows if this performance of theirs would be a one time thing? Inter are a big club and I have the feeling that if the new coach give them what they are looking for, the management would drop him from how I see it.
But we can agree Inter Milan has a solid squad in the Italian league, this victory is one which I see and consider as a statement and not like its some really  exercise of their strength but yes it also puts them on the tract to the scudetto this season because  the three points and 5 goals will count, they just need to further maintain this kind of result and further accumulate more points moving ahead so they will be able to actually secure the scudetto this season.
It's too early to judge now but what is certain is that the competition between Inter Milan and Napoli will still be presented this season and it will even be much fiercer than last season not because they both play in European competitions but more because of the equality of strength and even though Inter Milan made a change of coach but we can see how strong they showed in their first match, they are very strong and they just need consistency.
I guess Napoli wouldn't be able to perform better compared to last season, because they have a lot of competition to partake in and they ain't use to such tight schedules. The reason why they were in form last season from the beginning of the season till close to the end was because they only concentrated on Seria A matches. Inter is used to tight schedules and that gives them a hedge over Napoli this season.