Thankyou Greg and Sanford.
It is working well. I appreciate all you help, I learnt a lot from this experience.
No, I don't know how Marketo does redirects via the Admin section but you'd get the job done by sticking
<meta http-equiv="refresh" content="5; url=http://www.example.com/" /> at the top of your page.
Its funny how a project never ends, now I have gotten to this this point, Im looking into adding a JS spinning wheel on the LP so that in the brief 3 sec wait leads know something is happening.
I found this great resource, now just to figure it out spin.js
How about if we just take out the need for the user to experience any wait time?
Open a PM with me and Greg and we can get you the synchronous, as-instantaneous-as-possible way to do this.
ETA: I'm working with Matthew offline so he can get the zero-delay synchronous version running.