Don't be too hasty in blaming the PBP Compiler... if there was a problem you would have the majority of users up in arms, and since this clearly is not the case we have to consider other factors.

You've not given us the complete picture to be able to properly comment. (a) What Baud Speed are you using?, (b) What Oscillator Frequency are you using for the PIC?, (c) What Oscillator Xtal, Resonator, Internal etc are you using for the PIC?, and it always helps to know (d) what version of PBP are you using? (e) are you able to post the section of PBP code you're using? Sometimes people (including myself) can miss the obvious and another pair of eyes helps.