The reason people say NOT to flush, especially not for 2 weeks, is because it doesn't make sense to stop feeding a plant when it can most benefit from quality blooming nutrients.
I'll believe that flushing makes a positive difference in flavor or smokeability when someone can show me a reliable double blind study that proves there's a noticeable difference in final product.
HOWEVER.. since your growing for your own personal use, it's ultimately up to what can YOU taste. Assuming you're using decent quality organic blooming nutes, you can split the difference and feed right up through the last 3 - 4 days, then a final straight water. Let your taste buds tell you what is best.