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I'm surprised that you are surprised with that number, Mr.P. Isn't it normal with other cameras too (with a fresh battery).
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No.
With a D1-series camera, you'll often be lucky to get 300-500 shots with a fresh battery. The original Canon 1D also isn't very battery friendly. Granted, these aren't current generation cameras, but they're still in daily use.
Also, some cameras run significantly different electronic sequences when shooting RAW versus JPEG. For example, I've gotten less than half the amount of shots shooting RAW on a D200 versus shooting JPEGs.
Continuous shooting at high speeds actually doesn't contribute as much to the drain as you think. For one thing, you're simply capturing a bunch of images in one go. Autofocus and IS/VR are bigger drains on battery power.
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I do find it hard to believe that you fired off a picture (on average) every 3.6 seconds for an hour.
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I did it once at a fast moving event quite some time ago, but that was early on and I wanted to see how my camera held-up. Switching to a microdrive late in the event slowed down my shooting considerably. Also, editing it afterwards was no fun... never again, LOL