I know there may be no answer to this but let me briefly explain:
We own several websites that rank very well on Google and Yahoo. In fact, for some of our most important keywords we come up on page one and two.
However, one of our
Website Builder websites was ranking on the first page for a key term. This is an important keyword for us. When I go to

.com and search this we now come up on page two #13. We were #10 for some time on the first page. If I look at other datacenters, we come up #9 on most of them.
My question is:
1) Do most users see the results of

.com or some other datacenter? I was never quite clear on how this works.
Thanks for your help,
Scott