Maybe not Large Mouth but Smallies do go for the warmer water. They did here at the Nanticoke Hydro plant until they shut down. They could have been feeding on the smaller Perch that were drawn to it. So the answer comes with an asterisk perhaps.
Fish are drawn to a hydro plant to feed on the aquatic life grind up in the turbines. The presence of gulls is the give away. If the dam is generating, the dinner table is set.
In comparison, the draw of a warm water plant (coal fired or nuclear) is the warm water of the discharge. When the surrounding waters are cold, the bait congregates in the warmth of the out take which inturn draws the larger fish into feed.
Fishing these areas is seasonal with the best fishing coming at times of large temperature differentials between out take and surrounding water. A temperature differential of 20 degrees F is ideal
February to March is prime time around here. The 17 mile run from the closest marina keeps participation rates low for all but the hardiest. The rewards for making the trip can be high. Some of the largest fish of the year are caught at this time.