Most any pipe can be made to gurgle. Smoke too fast, you develop too much moisture too fast. Sure. But bad pipes... bad pipes gurgle no matter what because they CAUSE condensation - the smoke stream is a mixture of water, oils, esters, and solids from the burn - you knock that stuff out via condensation, you remove a lot of flavor! And it gurgles! Really good pipes are far more forgiving of poor technique, or slightly wet tobacco.
I think the crowd that is saying "Sure, my Stanwell gurgles, but so does my Big Ben" are missing the point - these are factory pipes, put together from parts, with very little care taken. Go to the next level of pipes and you'll find a big difference.
I don't want to brag, but a large part of my pipe making operation is geared toward the "first good pipe" buyer, or the guy who is upgrading from 100 dollar pipes and is hoping that the extra money pays off. Mostly... not always, but mostly, those guys come back to me and say "Holy SHIT Sas, this pipe is amazing." Not just me - most of the pipe makers I talk to and hang out with have the same experience. People buy 14 cheap pipes of mediocre build and then they buy a good artisan made pipe, or a Castello, and presto, there must be some magic in this old black hat right? Magic briar, something. But really all it is is that pipes built with the requisite care smoke 100% better. And if you haven't smoked one, you aren't in a position to speculate.
How many "Cobs (or Kaywoodies, or Dr Grabows, or whatever) are just as good as Castellos" threads are there? A thousand. How many "I've sold my Castellos and gone back to cobs" threads are there? None. Cuz it doesn't happen, really. It's a one way trip for most of us. Hell, I got into pipe making because I was fascinated that two pipes could smoke so radically different - what the hell was going on?
A pipe is a fluid-dynamics equation. It can be solved a number of ways (reverse calabash anyone?) but it needs to be solved, and when it is... hot damn, you get a great smoke.