> resets the body's ability to recover this incredibly specific learnt behavior, and the person momentarily reverts to a clean sample of their own voice.

What is one's "own voice?"

Nearly all speech patterns, dialects, accents, patterns and phrasing is learned from one's social circle. Speech itself is "learnt behavior." It makes sense that those engaged in a subculture or online community may take up the way people talk in that sphere of social influence. Before hand, speech patterns evolved apart from one another due to geographic distance. In the modern era, it doesn't seem unreasonable that one would have greater influence from an online community than a local one.

I don't see any reason to privilege a specific, arbitrary way of speaking to be "normal" and one's "own voice" and others to be learnt behavior one "recovers" from.