I absolutely agree with soccerman17 JPM is a lot more finished a driver than some give him credit for. Yes, when he has an 'off' weekend, it's so terribly terribly off, but most of the time he puts in solid performances, over and over and over again. Note, solid performances don't mean a 'hot' weekend, just an average one. It's that solid performance characteristic that would make him a good choice for Le Mans. And when he's hot? Very quick indeed.
I would love to see it. He has won three times at Daytona - but in much lower performance cars than LMP1 (or indeed LMP2 for that matter) - and with by far the strongest team. But yes, it would be interesting to see. I wouldn't automatically have him down as a top endurance driver, but he's showing more consistency in Indycar and avoiding trouble more successfully than was once the case.