He's partly right. In general, the ES line, IMHO, for a number of reasons, has been getting more cheaply-made, with less-attractive interior materials, and less-comfortable to drive since the superb 4th-Generation model, which, again IMHO, was clearly the best ES ever done.
He's probably correct, though, about the durability and reliability of the drive-train parts...a longtime Toyota/Lexus trademark.