Norm has said a few times in other threads that he still eats according to FTD, but his system is now robust enough to handle some high FP food now and then without major problems. For example, in the Q&A thread:
Occasional indulgence shouldn’t be a big deal, especially as your gut improves on the diet. You can always pick up the slack after the holidays. Following several years of lower FP dieting, I can tolerate more fermentable carbs for three to five days without much of a problem – perhaps a few tums. The best approach is to go by your symptoms – listen to your body.