Lenovo S205 artificially limited to SATA 300?

Hello,
I did read the Lenovo Blog, where those engineers claimed that they won't limit SATA speeds again.
http://www.lenovoblogs.com/insidethebox/2011/04/sata-3-0-600mbs-on-thinkpad-notebooks/
But it seems that on my Lenovo S205 the SATA 600 port is limited to SATA 300. I just installed a Crucial m4 SSD which benchmarked in my desktop PC about 410mb/s sequential read. In my Lenovo S205 it only benchmarks 245mb/s sequential read.
Is this a known bug?

Hi there,
Desktop and notebook to compare is not quiet fair...
notebook and portablity is the must have...should be run on battery most efficient, combined with a mix of usage and power consumption...so there is always a compromise...,
a notebook particular a subnote/or netbook will never reach high values, in graphics & speed...
a desktop replacement notebook could nearly reach the values, but not at all ...
A Desktop could be run with full speed the whole time, like a racecar ... graphics , ports  , the whole system could use power without that need of compromise...
i think the 245Mb/sec is a good value compromise for a subnote like the ideapad S205...
sincerely KalvinKlein
by the way there is no BIOS update for Ideapad S205 available ...still factory state 
Thinkies 2x X200s/X301 8GB 256GB SSD @ Win 7 64
Ideas Centre A520 ,Yoga 2 256GB SSD,Yoga 2 tablet @ Win 8.1

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