rb2011 download about 900Mbit with fasttrack
http://wiki.mikrotik.com/wiki/Manual:Wiki/Fasttrack#FastTrack_on_RB2011
RB951G - maybe more then 300Mbit with PPPoE and fasttrack. Maybe this test is limited by ISP speed:
http://forum.mikrotik.com/t/radius-server-not-working-in-2-8-11/127/1