Barcelona's 20% integer and 50% FP improvement (according to latest press releases) is only vs a Clovertown (not penryn based) running at the same clocks. The part in bold is extremely important, because it is expected that the quad core parts will only run up to around 2.5ghz initially. And these are peak figures. The general case will obviously be lower. Not looking very peachy for AMD right now, although in the server space HT3 will certainly help them smack intel for 4p and higher configs. But those aren't exactly volume sellers.