why did Ubuntu turn off kernel preemption in Edgy?

[Luka Renko]

On Monday 27 November 2006 02:59, Ben Collins wrote:
> It was a few of those very hackers that told me PREEMPT was a red
> herring, and 1000HZ was not suggested. It's not a bug that 1000 timer
> interrupts a second causes extra CPU load. Think of it this way: 1000HZ
> is 10 times more interrupts than 100HZ. That's 10 times more CPU load
> from just that functionality.

Any idea if dyntick patches are on the level that we could consider them for 
special -laptop kernel and leave -generic on 1000 HZ for desktop users?

Regards,
Luka