The question is what are you trying to accomplish? The delay gives a user time to hit carriage return and then change network and other setting through the dialog. If you reduce that delay below human reaction time, they will not be able to hit carriage return in time.
Lets say, for example you wish to dump the dialog all together. In bsp.h in bsp\platforms\<your platform> there is a manifest constant BSP_ENABLE_DIALOG. Set this to FALSE (and rebuild your bsp of course) and you'll get no dialog at all.
Available in V6.x and V7.x.
So what is your intent/goal?