Apparent discrepancy on overseas Google results in Rankings

[Gord69]

Probably a very noob question this ...

I'm based in the UK and have just set up a campaign which includes Google US. There seems to be a discrepancy between some of the rankings found by SEOMOZ and what I see when I simulate the actual search using Adwords > Ad Preview.

For example, a particular term shows "not in the top 50" for Google US on the rankings page of my campaign in SEOMOZ. But my US colleagues say that when they run the search they see us on page 1. And when I simulate the search via Adwords Preview, I also see our site ranking well on page 1.

I'd like to understand why the discrepancy

Thanks for any advice.

Gord

[SEOAndy]

As far as I'm aware, changes in algorithms are put live in the US before the UK. This might mean that theres been some slight changes or maybe the website has been re-indexed recently. Ask your US colleagues when the site was last cached and check that against yours.

I am aware that Google puts changes live in the US before anywhere else though. Kind of nice for us in the UK, we can see the storm coming from overseas