My masters' thesis supervisor took my thesis and submitted it to a well known journal and a couple of other conferences with himself as the first author and me as the second. I had defended my thesis and started work and did not have the time/motivation to write it out for the journals/conferences. He selected portions of my thesis, formatted them for the journal, and submitted it. I was too uninterested and busy to pursue the matter any further and just let it be.
So yes, given that stuff like that happens, I do find it impressive.