They did not show the results for the SAS controller only and in any raid form beyond raid 0. The throughput may be available for full performance but that doesn't mean it will perform nearly up to the pipe with the onboard controller with any parity raid. 8 port SAS even on a real SAS controller averages 600 to 700MB/s with a real SAS card. Burst can go well beyond 1GB/s but once again that is heavily reliant on the cache. The average performance for the entire volume is also reliant on the cache. I am just stating the limitations.
Eric
ADK