I uploaded my files for the 4th Boomer Sisters book on Wed, November 19th, at around 8pm. At that time, I ordered a copy to review (before I place my big Christmas order). Lulu says it usually takes 3-5 days to print before they ship it.
At 8pm Friday night (November 21st) Lulu sent me an email saying the order had shipped. That's right around 48 hours to print, bind and package that book.
I'm not sure Amazon.com is any faster in processing orders, and their products come pre-printed.