Re: Conroe uses a very mature Intel 65nm process, while Brisbane uses the very initial AMD 65nm process. AMD's process will improve pretty fast during 2007 (both power and speed).
Intel easily has a bin or two of performance after the initial launch version of Conroe, after which they have the 45nm shrink in late-07/early-08. My only point is that they are a moving target, just like AMD's 65nm process (and, currently, they are far ahead!).