I like the probe method, as it allows for every variable but one, my own skill in using it. No matter which cut of meat, how tender the steer, how hot I am cooking, how humud it is, it always comes down to the feel.
Now, I can lift a brisket and have a pretty good idea if it is done, there are cues. But, the probe is cheap, battery free insurance. I think if you are cooking hot and fast, you have at least an hour to pull a decent brisket. Thus, no need to get weird for at least 30 minutes.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."