If you note a differing level of enthusiasm from someone as they initially encounter other people, it generally follows that it is an accurate reflection of their unstated yet observable opinion and/or social ranking of each.
*The greater your urge to nitpick the nuances of this concept, the more likely it is that the truth of it scrapes too close to something you’ve long suspected to be true. Observable variances in enthusiasm are opinions in motion. Naysaying notwithstanding, this generalization rarely bends to scrutiny.