Thanks for the info. I guess my point wasn't Lance in particular. The guys I've looked at, the group at the top + Lance, appear to keep their chests parallel. Trying to keep your back straight just isn't practical and I don't make that one of my goals. First goal is to get rid of the gut. Second is try to adjust my position to reduce my substantial frontal area and getting my chest parallel is one of many factors.
On Lance, I think he dropped Watts being that low. In one of his videos he talked about how Levi can get so low and how really fast TTers look right in front of their wheel and he couldn't ride that way. I took that to mean he was only willing to do so much to his position.
Speaking of wind tunnel, I already told my wife that's what I want for my b-day present. Cheers.