I just re-reviewed the performance number from the site and I can't find any matching details for the config which provided the 917MB/s numbers.
In general, I have to say that unless you run the performance test yourself using a single set of hardware, trying to compare your results with theirs is not advisable. There are all sorts of reasons why the numbers could be different.
I would contact them and see if you can get a trial/eval version so you can run the tests yourself.