People say "spectrum" when they mean "1-dimensional ranged value". But a real spectrum is a bitfield of attributes.

Considering we're talking about real people and the real conversations you have with them, definitely. The 5 people I talk to and the patterns I've come to expect from socializing with them, and the way that those patterns interact with my own behavior, don't really have a neat apples-to-apples comparison with your 5 people and their patterns and how you interact with those patterns, etc. We could both be calling ourselves introverts and extrapolating wildly different chains of observations and predictions about how those hypothetical conversations would be affecting the other one's energy levels, etc.