If you look at my head, it's aligned with the center of the bike. It's too far to the center. My head needs to be further to the inside, closer to the inside mirror. "Kissing the mirror" is what you'll hear it described as. Your head, and consequently shoulders, weigh a lot. If you have that weight too high and centralized when your lower body is shifted over, you're riding "crossed-up" and having to work a lot harder to get the bike to turn. If you get your weight low and to the inside and balanced, you can negotiate the same turn at the same speed using less lean angle. (i.e. more rubber on the road, more grip, less on the edge.) Knowing that, you can go around the same turn with the same lean angle at a higher speed. That's how racers can negotiate turns at nearly twice the speed us mere mortals can. Look at that pic compared to the first pictures I put up and you'll see how much further to the inside my head and shoulders are. It's subtle differences like that that can make a huge difference in your abilities. I'm probably doing 5-10 MPH more in the first three pics on that same turn with about the same lean angle as I am in the one where I'm crossed up.
Remember, I'm riding pretty hard at this point. Still around 75% to 80% of what the bike and I could do if I were on a track, but still pretty hard for the street. Also remember that I only ride like this on a few roads that are very popular with bikes, that get scouted thoroughly for debris, road damage, etc... before any kind of aggressive runs are made, and I have 10,000+ miles of twisties and a few riding clinics under my belt. Not that I'm saying I'm an expert rider. Far from it. Just please don't take any picture I or anyone else post up as "Hey look what I can do, you should be able to do it too." Always ride well within your limits and apply proper technique as you learn it. Read books like Keith Code's Twist of the Wrist 1 & 2, Total Control by Lee Parks, etc... and apply those techniques as you get comfortable. 9 months ago I didn't think I'd ever be able to ride at the level I'm at now. But learning how to do it properly makes a huge difference. I'm also lucky to have a local riding group who I'm a member of who puts on free clinics as well as the local photographers to use as a true gauge of how my form looks. If you look through all the pictures I have saved on my computer in chronological order, you'll see the progression over the last 9 months or so.