Deifnetly! Its more the colder water, plus wind, or the splashing of water in your ear that causes it. When I went in for a physical for hockey, the doctor actually looked for extosis when I told him I kayaked. Luckily he said I didnt have anything sticking out. The solution is ear plugs, when in cold water! If you look at the history of a bunch of paddlers, it can become a huge problem. Surgery is now laser, or actual growth removal, but none the less, its easily preventable..... with some ear plugs.... and im easily guilty as charged as I don't wear any. But after my courses in human anatomy, its made me want to get a set!
If your at CKS, just stop by and get it checked out!