I can't say I've experienced that. Typically when someone tries to relate to me I don't have a guard up or keep a look out for deception. I do think even washing the dishes has yielded a meditative experience so I believe someone who says they've had similar experiences to mine while exercising or connecting in nature. Vedanta philosophy is not so common here in the West. Every journey is unique, especially in regards to ones spiritual evolution- and no doubt others may see some of you in them and maybe something to be desired. Even those who do practice meditation do not always exemplify the physical traits you say to look out for. I meditate, I have at times shown stillness- yet I have also been very restless despite my practices. It IS a practice after all- maybe people relate to you because they admire you or feel you are someone they can look up to/confide in.
In your example, I would believe them- and if you have the knowledge like respiratory states you can share that with those confiding to you. You might be helping them expand their practice and this could be seen as a loving service. I've had a friend share one of his visualization exercises as we opened up to one another about meditation and I still use it today. He is the one who invited me to see Gurunath. I am blessed he did not think me a phony or someone as being boastful and instead saw me as someone who took an interest in his life experiences and vice versa.
Vendanta ‘philosophy’ is more than a philosophy to me but rather it explains many of the meditative states in the EXPERIENCE of meditation. Therefore I have included this article to help illustrate and perhaps illuminate….
It may or may not be helpful to anyones understanding of meditation if they read some of this information ;
https://vedicfeed.com/stages-of-samadhi/#:~:text=Maharishi%20Patanjali%20has%20elaborated%20eight%20limbs%20of%20yoga,8%20Samadhi%20%28Self-realization%20or%20Nirvana%20per%20Buddhist%20philosophy%29.
Fundamental attribution errors can easily arise with people who have had little to no experiences with meditation yet they try to explain and describe the experiences of those who have been meditating for much of their lives or for many lifetimes.
When the mind is fixed for understanding the self, it is said to be in Samādhi. According to Paramahansa Yogananda, Samadhi is a soundless state of breathlessness.