Which reminds me: Dubside mentioned that he published an article in the December 2007 issue of Sea Kayaker magazine titled, "The Continuing Evolution of Greenland Rolling". That was news to me since I let my subscription to Sea Kayaker expire. So I actually stood in line with all the Christmas shoppers at REI and paid the full newstand price to get my copy. It was well worth the read. The article demonstrated to me that "traditional" paddling in fact changes. For one thing, they have to make up more complicated rolls for the Greenland National Kayaking Competition as the skill level rises.
Dubside also told me an interesting story about another article he wrote for Sea Kayaker a long time ago, about Commando Kayaking. It was rejected the first time he submitted it, on the grounds that it seemed to advocate behavors the editors thought were of questionable legality, or at best would reflect poorly on the sea kayaking community, such as camping on private lands and sneaking out before dawn, and dragging wet folding kayaks on public buses, perhaps leaving pools of salty water in the aisles. He rewrote and resubmitted it, but it apparently was lost in the Sea Kayaker office and ultimately forgotten.