Not getting full speed on RB5009

[jaclaz]

Could it be something along the lines of these issues with 2.5GB speed settings/ports?
http://forum.mikrotik.com/t/rb5009-slow-speed-2-5g-bug-report-as-requested/155362/1
http://forum.mikrotik.com/t/rb5009-2-5gbe-problems/169157/21