First of all, every time I've fed my BP it has eaten a little bit differently. Someone times it takes 60 minutes, sometimes 5. Sometimes she "plays" with it, sometimes she gobbles it right down. In my (relatively little) experience, as long as your snake is healthy and eating, there is no "normal" behavior.

As for the regurge, I've never had my BP regurge. My cornsnake did once, and although I can say much concerning pre-regurge behavior, I can say you'll know it when you smell it. As long as the temperatures are right, the meals are appropriately sized and you don't handle your snake for a couple of days after feeding, you shouldn't have to worry much.

Good luck! Enjoy your new BP.