Yes, that what's I was describing. It works just fine. When I tab back to Sublime, I get the "<filename> has changed on disk. Do you want to reload it?" modal dialog box. (If there are no unsaved changes in the Sublime buffer that could be clobbered, it just reloads the file silently as you'd expect.)
My test just now was on Windows, but I use it regularly on Mac and Linux as well, and I'm pretty sure I would have noticed if it silently clobbered changes like that. You're sure you had unsaved changes to the Sublime buffer for the file when you conducted your test?
I'm using btrfs. In any event it sounds like my test must have been flawed. Perhaps I didn't notice it doing an auto-reload.
I don't know what mechanism SL uses. A lot of my current work is using sshfs with editing happening on Linux and the endpoint being MacOS. inotify won't work for that, but more paranoid and repeated stats will.