Not at all.
Jindal has still been able to perform effectively in his state, and he hasn’t sought national office yet in order to test his “delivery” skills. Judging a person from one speech is not the way to judge the person’s skills overall.
All I heard after Jindal’s speech, and I’m from Louisiana, is that this speech took him out of the running for president or vice-president. I’m sure Mitch Daniels will still be the same governor he was before his speech. I have heard a lot of praise for its content, and I agree with that. It’s his milquetost delivery and his bland appearance to which I’m referring.