Ivan Popek has been spending a lot of time lately digging into TFS 11. He has written a series of posts on the APIs for teams in TFS 11, and he explains the burn down chart trend lines.
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Jim Szubryt has written a post listing the perf counters available in all versions of TFS and calls out the new ones in TFS 11. Check it out if you are looking at the performance of your server. New Perfmon Counters With TFS 11 Beta Whether you are a small company running TFS or a large Enterprise there may come a time for you too ...