Question about domain

I am looking to use a service featured here, but they say to be a little careful if you have a new domain/site for google.

I bought a domain from GD on march 7th, built up a 15,000 page website in about a week. Uploaded it and started doing some SEO. I check out my whois and says it was started march 7th 2010.

I just happened to check my site in google and check it with SEOquake. It says my website Age is May 2004, which I was completely shocked by. I checked it in the archives and yes someone once had it. There were pages in 04, 06, and 2007.

Now my question is does Google see my site as being a new site since march or will the see it as being older starting in 04 even though there was no site established when I bought the domain....

Thanks,

Most bots will see it as existing since May 2004. PM me if you want more info.