How Long?

Normally, yes.

It depends on the configuration and the model. For example last year in May when the iMac was refreshed most of the models were shipping within a week if you ordered on the day of the refresh, but certain configurations, such as the HDD + SSD, took a couple of weeks to ship.

 

Just walk into the store and take it home

 

http://forums.macrumors.com/showthread.php?t=1383401

 

In the past the store will close during the keynote, and more often than not they will announce that the computers will be on sale today or tomorrow both online and in stores.

 

It all depends on their initial available supply and demand. With iDevices, if you are able to get your online order submitted within the first couple of hours, you can get the earliest available shipping times. I think the same goes for the Mac lineups as well. After the initial onslaught, shipping dates usually slip to 1-2 weeks from there.

 

I specced up my iMac last year...Took 2 weeks to deliver, but I made a lot of changes to stock.

If the way Apple dealt with the launch of the iPad 3 is anything to go by, I would think you should be able to get stock models pretty quickly. But who knows what they will be...

 

What’s “a lot”? CPU, RAM and HDD – what else was upgradable???

 

I took it too the I7 2GB Video...the Ram I did myself.

 

If you want to get rid of it i'll give you £250

 

Dream on....

 

To the OP: Apple is now updating its online store.