I seem to recall my TM teacher saying that TM might make one more sensitive, not necessarilyh "cool as a cucumber".
Of course it's impossible to tell whether it's due to years of fairly regular practice of TM or whatever, but for instance my lungs are nowadays extremely sensitive to even the smell of cigarette smoke from another apartment through the structures or stuff. (Before my initiation I often smoked quite a lot especially during weekends when I was usually drunk as a cuckoo (kännissä kuin käki)). So, when I notice even the faintest smell of cigarette smoke, my lungs downright start to ache. I recently noticed that eating a lot of raw garlic somehow prevents my noticing that smell, and - lo and behold - also prevents that nasty feeling in my lungs.