They got taught a footballing lesson today, we had close to our best side out (gundogan would be in it) played our best style against strong opposition which is our high intensity pressing game and dominated them to the point it was almost cruel. We showed we are by far the best side in the country. However, they don't have to play us every week. They only have to play us once more his season.
Who else can you see in the league doing that to them? They've played Liverpool away with 10 men and handled that fine, United aren't going to dominate them they'll play even more counter attacking than what Chelsea could. Its like when we used to struggle with liverpools press in Peps early years, it wasn't a huge problem because they were the only side capable of doing it to us, and we're the only side capable of keeping chelsea that quiet and not allowing them a shot target.
Against lesser sides, they're built to be ruthlessly efficient both in defence and attack. They have a very solid foundation and have multiple ways to score goals in games. They'll do very well despite this reality check for them and I still think they'll be our biggest threat.