tokala
Emperor
I need proof to believe that
Here is a comparison of Pentium M vs Pentium 4.
In the gaming benchmarks, though mostly GPU limited, the Pentium M 1.6 GHz is roughly on par with the Pentium 4 3.2 GHz.
I concede that later, faster Pentium 4 iterations will fare better, so the 4 GHz = 2GHz is a bit misleading. On the other hand, you do probably not want to have those later, more powerful models in a notebook with their 60-90W TDP.
Should better have formulated it "Core2Duos and their predecessors will be up to twice as fast per core at the same clockspeed as pentium4s found in a notebook"
Edit: Things look even worse for Netburst when comparing E6300 (1.86 GHz) with Pentium EE 965 (3.73GHZ)