I used a stop watch for my laptop and got 29.99 seconds (bootchart would be more accurate)
CPU: Athlon II 2ghz (64bit)
RAM: 4gb ddr2
HDD: 320gb wd black 2.5" WDC WD3200BEKT-00KA9T0
GPU: Nvidia's GeForce 8200M (proprietary driver)
Kernel: 3.6.1
OS: xubuntu 12.10 64bit (installed from beta 2 iso)

Could a mod make this a poll (because i can't) using options like
0 to 10 seconds, 11 to 20 seconds, 21 to 30 seconds, etc