Am not surprised by Liverpool current form as they have started the season on a hundred percent record by winning all three points and topping the league table even though it's too early to be coming to conclusions Liverpool made a significant investments this transfer window, so this type of performance is expected from Liverpool because they are one of the biggest spenders this season
I'm sure that thier fans is even expecting more than this because they really spent a lot this season, and yeah we can't jump into conclusions until they meet with manchester city, chelsea, and manchester united. if they can be able to defeat this above mentioned teams then I will give them my blessings 
but I'm not sure if manchester city is going to be a threat to them considering their previous performance. I don't mean to underestimate them but is obvious that manchester city started this season in a very simple way I was thinking that they will be more aggressive than last season but I was wrong, I was so disappointed with the way they performed in thier previous match.