Ya The problem lies in your system bios, if your HDA is set to 15 to 20 secon, Instead of 0 to 5.

Why?.. well Any time i Change DVD boot from 30 or 20 It takes a long time to read and boot..
if I changed it from 0 to 5, snow boot the dvd and load Everything Within 15 to 35 secon.
So I think it the same for the HDA BOOT.

Anyway that my theory ...

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Asus Rampage Extreme x48 / intel Q9450/ OC 4.0Ghz 4core
Corsair GT /6GB/DDR3 1603mhz/
Mac Radeon ATI HD-5770/1GB/
Lion 10.7.3 120GB SSD/ Mountain Lion 10.8 250GB SSD
Logitech HD-c905 webcam
Apple keyboard bluetooth+mouse bluetooth
Acer 24" HD Screen/ Fillwater cooling system