Are the guys that are hitting over 30K on LN2, cascades or DI ?
It's hard to say from just looking at a number. A lot of those guys have a great deal of knowledge about OCing and do many things to get high scores, like motherboard mods and tweaking the BIOS settings like memory timings and other things.
I am not sure but I have not seen how jAkUp achieved his score but go over to http://www.xtremesystems.org
and take a look how some of those guys get the high scores. There is much more than changing the CPU multiplier and upping the FSB.