I say (as do the earlier tear downs/BOM details on the iphone 4 design refresh) that this is wrong.You have clearly misapplied Amdahl, if not link to a respected source of the same idea/application, unless you really do think you are a Nobel in waiting with this.Yes the writer for the Economist is a fool, also I am a fool and a pedant for pointing out yet another mistake you tried to hide.