Almost. In the US amazon has invested so much in logistics to pull that off that they are no longer the low price supplier all the time. However because of selection I know I can go to Amazon and find what I'm looking for, and the price is close enough to the best possible price that it isn't worth price shopping.

When I know of someplace else to get something I'll go there instead and normally get a better price. Amazon might get it a day sooner, which is rarely worth it (if I want it sooner I'll pay extra for next day delivery which most places will offer.