Who is good? We don't know. Toronto has the best record and a good point differential but a decent chunk of that is a 32 pt win over Philly. You don't want to discount every big win, but ones against potentially the worst team in NBA history? Also 4th easiest schedule so far
The Bulls are 7-3 but there differential isn't amazing and they have had the easiest schedule in the league so far.
Wizards are 7-2, mediocre PD and, yes, easy schedule (5th easiest). Yes its a trend- teams in the East will have easy schedules this year, only 4 of 15 so far have faced even slightly above average schedules and one (Philly) is because they don't get to play themselves.
The Cavs looked like crap at 4-3 and then like gods at 5-3. Is one big game enough to forget that they were fighting in 1 pt games against Boston and Utah? The offense will come together but will it come together as a very good, top 5 team, or an unbelievably good top 5 team of all time? Without the latter they need some massive defensive improvement as well (which I think they get just with time and Lebron playing D).