We can agree to disagree about moisture (not saying liquid water) in a tire. In the south we have 99.9% humidity on a daily basis. I've seen water coming out of compressed air lines.
http://www.tirerack.com/tires/tirete...jsp?techid=191
https://www.google.com/webhp?sourcei...e%20in%20tires
Lots of information on moisture in tires and the theories of using N2. There is moisture in the air we breath. So, it is almost pointless to go through the added expense of using N2 on a street car. Just check your tires pressures often. You never know when you will pick up a small air leak in a tire anyway.