Thanks Mocus.
You kind of answered my question.
It's not that I have any particular domain in mind at the moment, but I was more meaning if a domain is showing as available to reg.
In the past I have come across the problem where I registered a nice domain through hostway.com (I'm 90% sure it was hostway) - I get a confirmation email and a receipt for my payment. On checking the whois through the registrar it shows my details, but when I check through 'terminal' (an application on Mac, similar to a dos prompt, where I can check the whois through 'Darwin' or whatever it's called) it shows the domain as unregistered...
Then the next day I check the whois and it is now under someone elses details, so they must have got it before me?! I just don't know how they managed it.
So maybe some registrars collect orders and are manually processed, and others have some automatic way :greenconfused: (which might be what you were saying)
So I would just think that some registrars can't be relied on if I need a domain registering urgently before others get it - because of processing times. In my case above they just refunded me the money and said sorry :sigh2:
I'm not a big fan of Godaddy, but I have domains there and maybe like you said, with them the order goes through straight away.