While that is true, I think the chart is misleading in that it doesn't properly weight the tests. Failing to have any sort of globalCompositeOperation is a huge thing, but IE only lost one point for it. I would say that some of the things that the other browsers got dinged for are much smaller in comparison.
You could argue about the weightings all day though. Will people actually use every single one of those composite operations in real life? Shouldn't the important ones be weighed more? etc.
