[Magic.]

Blah I had this arguement at my old Church youth group ...
I do think that if you're gonna say "Big Bang" then you have to admit that something caused that to happen, something that hadn't triggered before. A lot of scientists admit that could be a higher powere ---> God. Fair enough.
As for creation. Rather than "maybe the Earth went slower" how about time has changed since then? It is listed in the Bible that people lived to be like 800 years old, even without modern health problems I doubt that those 800 years are the same as ours now. And as a non-religious example, there used to be 10 defined months in one year, two were added. The year did not get any longer, but the months got shorter, our measurement of time was adjusted.
I personally believe that science helps provide proof for religion. Before we impacted the Earth with all our crap it still changed, things evolved, something had to cause those changes. For people who have faith, it is fair to assume that that could have been God.