To say a pipe does not influence the blends flavor is foolishness. It's common knowledge from any pipe blender or knowledgeable pipe smoker, much like with a sommelier for wine and how glass shapes compliment the different styles of wine. A straight Virginia flake is best smoked in a tall narrow bowl. A wide bowl is best for English blends. Wide thick walled bowls for burleys. I didn't make the rules, they were in place before I started smoking a pipe. This was the common knowledge you'd come across in articles and it rings true to me,as there been English blends that Iwas completely underwhelmed by, and then switching tl a wide bowl it brought out the flavors. It's not like the shape is going to make a blend you don't enjoy enjoyable, just as fine scotch in a tumbler vs a glencairn, one isn't going to taste different enough to be unrecognizable. But a glencairn is going to provide a better experience and has been designed to enhance the senses to the whisky. So this is the same analogy to tobacco and pipes. It doesn't mean you have to follow it, but as a general guideline there is truth to it