
I know for a fact that Adobe's optimizations are "file size" oriented. It is said that developers at Adobe are strictly dictated over patch sizes and new versions in about 3 digit byte levels. Also I know for another fact that Silverlight is CPU-wise optimized. So why not fully support Silverlight instead of so called slow Flash on Safari Mobile. At least we'll have an alternative, and that's better than nothing.
Over a night, things change. Today the video on internets may equal to Adobe's Flash. Tomorrow, if everything played nice by Microsoft, it could be Silverlight in my humble opinion.