WebKit has an advantage with WebKit prefixes when the prefixes in question have no spec. As DarkShikari said when criticizing the VP8 spec, code is not a spec.
Let's see if we can't tell the difference between -webkit-transform-style, a fiddly CSS property that to be useful has to be documented enough for web developers to employ it, and the interpolation filter embedded in the guts of a black box video codec.
