Stats from igre123.net (flash gaming site) we run: about 1.5m uniques/month: chrome: 38%, firefox (mostly v8&v9) 37%, IE 20% (v8 62%, v9 23%, v7 9% & v6 4%). So >80% HTML5. I can't find data for flash it the new analytics. But last time I checked (when I was stil able to) it was high, almost 100%.