It really doesn't take long to make an impression. Although worrying about this too much can only have the effect of making every first meeting uncomfortable, it is true that it's easier to form our first impressions than it is to change them.
So when they sync up nicely with who someone really is, that means we're blessed with a fast friend.
And when that someone is a dog who stole the internet's heart in one five-second video, that means everybody is his fast friend.