Why the hell would you have an SSD on an USB port? If you're going to use an SSD as an external: Why? Use a normal HDD, it'll be a lot more size for the same amount of money, if you want an ultra fast RAID array...Why would you be using USB once again? You'd really want to look at a NAS over Ethernet instead.
It's like complaining the Atom can't render stuff in 3DSMax as fast as a 8 core Sandy Bridge at 5Ghz, of course it can't, it isn't meant to either.
I can see newer motherboards having Thunderbolt, USB3 and Wireless USB on them, let the consumers decide really.
Thunderbolt should replace SATA if anything.