Yes, absolutely! I only make chicken broth because I have the carcasses from whole chickens. I am not saying that chicken broth is bad (although hens are way better for soup!), but turkey necks are my favorite as far as broth is concerned. The flavor is more pronounced but still far from, say, pungent (like duck broth, which is also great if you don't mind the strong smell and taste).
By the way, turkey necks are a great option for those who are on a tight budget. They are quite cheap (at least where I live), and there's a lot of meat to pick from them. One whole neck (+ some vegetables) is enough to feed two adults. I sometimes eat the meat with mustard or grated horseradish for breakfast (I mostly make broth in the crockpot overnight). In other cases, I use it for risotto or for omelette filling, with whatever vegetables and cheeses I happen to have.