So VS11 is roughly 10% slower than VS10 for that test case. Can't say for sure why, but the fact that it is pre-release software as mentioned is likely to have something to do with it.
Thanks. Here VS11 is over 15% slower than VS10 with 5 million for input. The point about the pre-release software may have something to do with it, but I'd like to point out again that the numbers are reversed on the Ebenezer side -- the Ebenezer test with VS10 is over 20% slower than when built with VS11.