This benchmark is a bit misleading, as it is not comparing like with like. On the only benchmark where WebGL doesn't help, IE 10 does respectably. I have found

This benchmark is a bit misleading, as it is not comparing like with like. On the only benchmark where WebGL doesn't help, IE 10 does respectably. I have found in my limited testing of 2d canvas that IE 10 performs quite well. While it would be nice to see WebGL in IE10, 2d canvas-based apps perform very well.