Back in '06, Mine was ~8 weeks from order to delivery.
I was able to get a rail car number and track it via Union Pacific's website. I had to go over the salesman's head to get the rail car number, though. Then, he didn't believe me that I could track it. So, I bugged him every other day, letting him know where it was!
Then, it sat in the phoenix distribution yard for a week! Apparently they only deliver 1 dually per semi. IIRC, some line about the dually's being too long & wide.
Tony