I'm getting 50 to 80 Mb/s as reported by the config utility that ships with the Tenda kit. Subjectively my media player responds faster on the Tendas than it did on a strong 802.11n WiFi signal. For sure the connection is much more stable with Powerline.
The 85Mb/s units are obsolete technology. They aren't compatible with newer Powerline generations like the Tenda's HomePlug AV (200+Mb/s.) From Wikipedia, "HomePlug AV, GP and AV2 are fully interoperable, and will also interoperate with the IEEE 1901 devices. HomePlug 1.0 devices do not interoperate with HomePlug AV devices."