amazon has been shipping out thousands of PS4s, from what it sounds like they have hundreds of thousands - I really do wonder what % of console sales this year will be solely from amazon. All the bundles are going out first apparently, ahead of people who placed just console orders on June 10th. Its not always happening by purchase date, it looks like those who are furthest from the distribution center are getting orders out first, to make friday delivery. I'd guess most launch systems should ship out today and a few more tomorrow, all for friday delivery.
the only concerning thing is I don't believe most have signature confirmation, so you need to have someone home so a porch robber doesn't steal your shit. I also feel bad for anyone who eBay'd their PS4, without signature confirmation eBay/paypal will always side with the buyer and refund the money.