I ordered from Wayfair and the estimated delivery was Monday (i.e., 5 days after ordering) - this later changed to Wednesday with no real explanation. Further, customer service stated that it was shipped and hence could not be expedited (in reality the item was still being "prepared for shipping" and likely could have been expedited). 

In short, I ordered from Wayfair and paid a higher price (not exactly comparable bookcases but very similar) because quick delivery was paramount. I felt short changed when deliver was 2 days later than estimated.