If 15-25% overhead of a USB2.0 transport is any indication, maximum real-world transfer rates of the USB3.0 bus will be in the range of 400MB/s. A 4-drive array will easily achieve that, and so will a 2-drive array of SSD drives. That doesn't even touch photographers and videographers demands of fast transfers from flash storage where USB2.0 long became the bottleneck.
There is virtually no point in testing a single external drive's transfer rates as no single spinning drive transfers faster than 150MB/s. Arrays are a whole different bowl of soup, and USB3 makes a lot of sense for 4-bay boxes and toys like Drobo.
The article is useful, guys - I, for one, didn't know Intel wasn't planning on putting USB3 in their chipsets until 2011. Quit knocking the author down - he did a good job! :)
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