A few hundred miles is what it took on my integra. Did you use that anti-squeal stuff on the back and sides of the pads? You can also buy some brake rotor cleaner and just spray everything down. I was getting pissed when mine kept squeaking, but after a while the squeaking went away.

Did you buy semi ceramic brake pads? Also, asbestos is no longer used in brakes, so this causes some more squeaking too.