Usually, no. Calipers tend to continue to work the same unless they start leaking. (or slide pins are bound up or whatever). But if you look at the caliper piston(s) and see that the dust boost and perhaps seals have deteriorated, you'll know that it won't be long before the seal starts leaking.
In your case, I'm inclined to believe you didn't get the system fully bled. Once air gets in the lines (for any of a number of reasons) it can be very difficult to get it completely bled again.
Another aspect is, that the friction level of the bendix pads may not be quite as high as the factory pads. Actual data for friction levels is rarely available, and when it is, it is wholly insufficient to caracterize the real friction profile seen on the vehicle.
