I don't think it will hold up your order...I order from a demo in another state and when I go to her site to order, I have my items the next day (well, it helps that I am in spitting distance of SU's warehouse!!!) but....I would think they would arrive in normal shipping/processing time.
One thing I want to add because I just now found this out the other day when placing an order...I went to the SU site and signed in. It told me my demos name at the top and I started adding items to my cart and noticing that I was not being prompted to pick rewards or anything like that so I shot my demo a quick email...she told me that I have to actually go to her blog and click on the shopping link and go from there. When I did that, I was forwarded to (what I can only guess is) a different SU website area where I started to, once again, fill my shopping cart. This time, I was able to get all of my rewards with no trouble. Just passing that along in case you did not know
I would hate for you to do the same thing that I did and risk missing out on the great Sale-a-bration goodies!!!