I noticed that too. Yoda just sort of became a retard in the PT. I pretty much lost all respect for the PT Yoda when he turned into "Yoda the flying squirrel" at the end of AOTC. I was like, "Well, that's it then. This Yoda is dead to me." The dialogue just clinched it for me.

I did like "Yourself you speak of, or someone you know." line. That seemed to be the only line delivered that made sense. Everything else he said seemed to have been dumped in to a mail-order "Yoda dialogue generator" Quisinart that Lucas concocted at the ranch for latenight shoppers.