When I plug a USB2 device in, it complains that performance will not be as good as it could be, because the interface is only USB 1.1. Whether performance actually suffers, I have no idea -- I suspect it would, otherwise why the fuss. But none of the USB devices I've attached has been speed-critical.
I know what you mean about the Parallels shared folders and drag and drop, I just think drag and drop between host & guest is really cool, and "another tool in your personal computing efficiency toolbox".
Or something.
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