Thanks all guys.. I got what I needed to know..
My response to your comments for clarification...
1. Friends, I absolutely DID NOT mention anywhere in my post that I've been working on 600. Obviously I'm here for requirements gathering, technical design consolidations and business meetings for starting a project from offshore after I go back. I'm still getting Indian salary. And here, just getting company paid accommodation and allowances to buy food. I was just needing to know that whether my stay on 600 can be considered as local experience or Not.
2. It's not in my company's interest to file my 457. It's in client's interest who is changing it's priority and willing keep me here for longer duration to start and manage the project from here. Neither me, Nor my company is breaking any laws.
Thanks again.