Can confirm that my 7D is great for certain kinds of video. In the usual way that DSLRs are all great for cetrain kind of video. And crap at others.
I can also confirm that of the dozens of video cameras I've used over the years, from BetacamSP through SX, DVCPRO, DVCAM, Digibeta, HDCAM, HDV XDCAM, DSLR I've encountered moire at some point to some degree on all of them.
A lot of folk are missing the point. No matter how resistant a camera is to moire, theres always something that will find the right pitch, usually at the worst moment. I like Canons solution: batter the phuck out of the resolving power by using tracing paper instead of an AA filter on the 5D3. Or by getting folk to buy into a system with much larger pixels like the C cameras.