No, you have to wait 4 days to create the new article anyway.
I do believe you can create immediately. You're maybe thinking of semi-protection, or page moving. (Really, try logging out.)
Speaking of which, I understand the page move restriction on new accounts was a temporary measure. Specifically, to protect against a certain person on wheels. This person seems to have moved on, no?
On the other hand, I wouldn't be surprised if it is precisely these obstacles which also cuts down on the nonsense.
Damn straight. :) Seriously, what gets posted at AfC is sludge. And that's from the newbie editors who actually made the effort to wade their way through the process and make a submission!
The only benefit in allowing anons to create articles is in stroking their egos long enough for them to become good editors (while deleting their creation in the meantime). We should attempt to quantify that benefit.
I assume this is based on the idea that new accounts can't create articles. If that were true, it would be a very different story.
As it is, I don't see this as a choice between allowing or disallowing "anon" page creation at all, since account creation is unrestricted. It's more of a question of "how many clicks must an unregistered person go through to create a page, and how obvious should we make it which clicks they should make?"
Regards, Daniel Mehkeri