In Visual Studio 2008 when you build in \'quiet\' mode the build output window looks something like this:
Compile complete -- 0 errors, 0 warnings
------ Bui
This output is not from Visual Studio or MSBuild, it is provided by the VSCommands add-in - see this blog entry. You can investigate settings for that add-in and see if this summary can be disabled, or remove the add-in so that you no longer see this summary detail.
For those that are interested, I found this with this Google query.