We've discussed this one before... usually (I can think of only one instance where this has NOT happened) Axiom sticks to the ship time as of the order placement. In other words, since when you placed your order it was 6 weeks, you get them in those 6 weeks. If you were to place your order today, you would ge them in 8 weeks. If you're really concerned, give Axiom a buzz!

I am the Doctor, and THIS... is my SPOON!