I was watching ESB the other night, and never noticed how normal Yoda talks compared to the PT Yoda. Maybe 10% of the time he talks when he reverses the sentence, as most of the time he trains Luke he really talks in normal sentences.
Then watching the PT Yoda, and almost every sentence he talks in reverse? If you compare him to ESB Yoda, he sounds like an idiot in the PT.
I wonder if Lucas has watched the OT since they came out sometimes........