TurboBoost on laptops has always been poop. Take the 3720qm and 3940xm - yeah the latter has a higher TB, but under high load it runs very close to base clock, while the 3720qm runs a bit higher than base... resulting in a minimal difference :/

That's disregarding TDP/TPL adjustments/overclocking, of course (which is disabled by BIOS on workstations anyway).