The truth is that power matters much more in the mobile market than it does in desktops.
Even though true, it doesn't diminish the fact that Prescott is stuck between a rock (power consumption and leakage) and a hard place (temperature), both of which are significantly worse than Hammer's.
And Dothan is kicking Athlon's butt every way to Sunday. Not bad for a "slight advantage."
Overstating things a bit? Dothan has the thin & light market sewn up currently, yes. However it looses to Hammer outside of thin & light, and it dies the day Microsoft's marketing push for XP64 begins.
fpg