I bought a Hitachi Touro 1TB 2.5" USB 3.0 drive. Plugged it in and only got about 38MBs from it. Sure enough, it showed up as 480Mbs in system profiler! I plugged it into the left-hand USB port on my 13" rMBP and it showed up as 5Gbs and I got 90MB/s out of it. Apple's site shows both ports as being USB 3.0, what gives?