In following tradition, below are the updated benchmarks of the Release Candidate of Server Essentials. As you can see from the benchmarks below, things have not improved in terms of performance. In fact, some tests were a bit slower. I am using the same hardware in the same configuration as before for the testing. I will continue to test all releases including the soon to be RTM Server 2012. If you are going to spend for Server Essentials when it is released, spend the extra $100-150 for a inexpensive RAID card and get 2-3x the better better performance that matches this high end software where.
Results from the Release Candidate
RAID 5 Comparison Benchmarks