<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> So if a brisket is dry, there are two possibilities: it might be undercooked or it might be overcooked, and that window in between is the fork tender window. </div></BLOCKQUOTE>Right.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> The FORK TENDER WINDOW ("FTW") is dependent on the cook temp. and the quality of the meat. </div></BLOCKQUOTE>Well--the cook temp will determine how quickly the brisket might get to the FTW. The quality (in this case meaning amount of internal fat/connective tissue) is important as this will help determine how much time the brisket needs in the rendering stage. It's time in this stage that determines final result quality: a brisket with more internal marbling, one that is thicker, will require more time than one with less or that is thinner.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> Higher smoke temps followed by foiling and oven temps between 310-325 is more likley to result in a moister brisket. </div></BLOCKQUOTE> In my opinion, yes. But this doesn't mean that it's the only method that works of course.
Cooking at higher temps results in a narrower FTW time-wise, but imo lessens the chance of the brisket losing too much in the way of moisture. Low temps widens the window time-wise but, again imo, increases the time for moisture evaporation. Employing foil (at any cook temp) can shield the meat from direct heat and lessen the evaporation push. Foiling can also set up a braising scenario and one must be mindful that foiling too soon or for too long can facilitate a result with a pot roast-y texture, especially if cooking at higher temps. Heat transfer is more efficient during braising which can be very helpful--it is both efficient and gentle--but can result in wildly divergent internal temps. It is best to rely on feel and not internal temp to determiine 'done', though this is the case regardless if one has foiled or not.