There is NO PERFECT CHAIN LUBE for all applications and probably will never be.

The best lube for you addresses, the conditions you ride in, how often you care to lube, the amount of miles you do.

For example: I ride in very sandy conditions, the superior lubricants reccomended by many are excellent but attract to much sand for my location.

I use a lighter, dryer, wax type lube and lube more frequently.

As far as what's on Lance Armstrongs bike chain. I'll bet it changes whether he is conditioning in Colorado on his own bikes or doing a Time Trial in France.