Even at 4MHz, the difference between adjacent HIGH/LOW commands is only a couple of uS. If you're driving a Relay, LED or Lamp requiring that current, it's really not going to know or care for that short time span. Do however protect the PIC with additional Diodes to clamp the back-emf if you're driving a Relay or Solenoid directly. If you're powering-up an electronics module, I still don't think it'll care about a supply rise across 5uS or so... hell, even the best PSU's in town don't come up that fast!