Three of us (me, Marko and Mike) made a test run back in May or so to make sure it wouldn't be a problem. We entered from the strip drove into the garage and all the way to the top. At one point, we stopped on a ramp to check how much clearance Marko's car had. It was close (about 1" to 1.5" to spare) but we all made it without scraping. We then drove all the way back down and under the porte cochere at the front without problem.
If you're going to be hauling butt up or down the garage ramps then you're probably going to scrape, but if you're taking at a reasonable speed you'll be fine.
On a side note, the garage has great echoes and it was easy to set off many car alarms as we drove by. When several hundred of us are pulling in it'll be hilarious how many car alarms will be shrieking.