Yup...like has been said:

1) Don't go by what pet store employees say. In general they tend to great sources of incorrect info. I had an employee tell me that 4 feet is small for a bp and I chould expect them to easily get to 6-7 feet and 12-14 inches around. I'd like to see that bp! :eek:
2) Definately wait at least 48 hours after feeding to handle you snake.