I really liked the bike course except that one downhill section with the rough pavement. I didn't see any drafting and I was riding solo for a good portion which is odd in an IM. I actually was pretty much right on target time wise (5:16) but I rode 15w lower (230AP, 239NP)than planned so I guess I'm more aero than I thought. My weight was a huge disadvantage (192lbs) on that course though. The run course was pretty hard if you ask me. However, I'm still not sure why I didn't have a faster run considering I was under my goal power. I ended up riding at IF=0.68. I was short on calories on the bike by 100-150kcal/hr so this might explain some of it.