Dear janek, a useful fix to add to Chameleon Wizard's kernel flags is:
(must go both together, separately they won't work)
If some Ivy Bridge H6xx chipsets fail to boot fast, this weird flag speeds up the process. Worked on mine, but eventually used a patch to modify the IOAHCIBlockStorage.kext.
The finding was reported by user bcc9
This has to do with "a nasty time-dependent bug in 10.8.x" specially related to Ivy Bridge chipsets (like my H61N) and also solves some "waiting for root device" issues.
For your consideration ;-)
Credits go to bcc9