That seems to be the decisive opinion of the left. I haven't blogged his speech because I didn't see it--I was speaking at an Atlantic event and was shuffling around the stage during the response.
I have to say I was shocked at how bad he was--a reader nailed it when he noted that Jindal sounded like he was narrating an educational video. I was shocked because I've seen him in person, and he was really good, not in Obama's stentorian "I Am a Statesman" way, but with a warm, understated charm. The only thing warm about Jindal's speech was the cheeks flaming in sympathetic shame as they watched it.
But does that really mean that he's stuck at governor? Sebelius seems set to make the jump to HHS even though her response to Bush's state of the union was even worse than this. Responses to the state of the union are difficult to do well--very few people, even politicians, are naturally gifted at talking to a camera as if it were a humn being. It seems unlikely that a single bad one is actually going to prove the end of his chances at a 2012 run.