There is no USB2 enclosure. The brand new Bytecc SATA hard drive dual dock says 'Super Speed USB 3.0'. That is plugged directly into the new USB 3.0 Adapter.
To further clarify, the transfer speeds I'm asking about are from an internal raid drive out to the USB3 port to a drive in the USB3 dock, or from Drive 1 in the dock to drive 2 in the dock.
Update: I found newer drivers, and was able to get the RAID to USB3 transfer rates up to 66 MB/s. Turns out my eSATA is still connected and that transfers from the same RAID drive at about 116 MB/s. The USB3 is cleary under performing.