Interesting (to me) tidbit: I was on a weeklong trip in Bowron Lakes back in the 80s with my 16' Wenonah WWC1 (fast but deep--sit and switch). My partner was in an 18'6 solo kayak, which he had used on a 30 day solo kayak trip in Alaska. A couple of days into the trip, he was frustrated that I had kept up with him. So, for jollies, we did a sprint with loaded boats. It was a tie. I find comparisons between double and single blades amusing. I'm an ex-WW kayaker, and ex-marathon canoeist, and own a fairly decent 16' touring kayak. I paddle my kayak with a double blade, and my canoes with a single bent (or straight if there's whitewater). If I had a pack canoe (not a PakCanoe, which is an elephant of a different color, and in which I spend most of my paddle time), I'd delight in using a double blade for which it was designed.