I made again a test yesterday, and found out that mingw makes 7.4% faster programs than VS2010. Of course that was just one test, but still, speed is everything, and also compiling times are much faster, and also IDE loading times are much faster. VS2008 and VS2010 makes about the same speed programs, but in VS2010 makes it more automatically, while in VS2008 you need to manually optimize the code.