For the fastest computer experience possible I recommend changing this value to zero. This will allow the different tiers to appear instantly.
Start Regedit. If you are unfamiliar with regedit please refer to our FAQ on how to get started.
Navigate to HKEY_CURRENT_USER\Control Panel\Desktop
Select MenuShowDelay from the list on the right.
Right on it and select Modify.
Change the value to something lower (note: a setting of zero (0) is virtually instantaneous - experiment with other settings (200 or 300 or 400 perhaps) to see what you are most comfortable with..
Reboot your computer.