> I read somewhere that TearFree is triple buffering, so -if true- it's my (perhaps mistaken) understanding that this adds a frame of latency.

True triple buffering doesn't add one frame of latency, but since it enforces only whole frames be sent to the display instead of tearing, it can cause partial frames of latency. (It's hard to come up with a well-defined measure of frame latency when tearing is allowed.)

But there have been many systems that abused the term "triple buffering" to refer to a three-frame queue, which always does add unnecessary latency, making it almost always the wrong choice for interactive systems.