I would suspect that more and more insulated vertical pits (FE, Spicewine, Backwoods Stumps etc,) are showing up in the winner's circle than traditional offset pits, especially with what is passing for competitive BBQ now.
Let's face it, a lot of the winners are poaching their chicken and wet braising their ribs, pork and briskets with very light smoke. Vertical units are easier to control, don't have to be fueled as often and are more temperature consistent throughout the cooking chamber. Add to that that Pellet poopers and charcoal towers have significantly shorter learning curves than stick burners.
I heard this at a comp which pretty much sums it up: "The offset stick burner is the best biased ply tire running in a race full of radials."