It may have something to do with the fact that your sedo parking page shows
7 out of the ten links as .co.uk ??
With such a high amount of visitors in a few days your traffic is "probably" american.
I suggest you play around with the keywords until the majority of the ads are .com ones related to usa.
I am not sure how it works - I think it is because it is parked by "someone" in the UK, I would contact Mara at sedo to ask - if they don't get back to you try parking it at Namedrive or somewhere else and you may get a far better result.
I would also stick with just "car Insurance" for the keywords
results below are from overture although its 272546 for
"auto insurance quote"
1825937 car insurance
272546 car insurance quote
180740 car cheap insurance
68836 car company insurance
62579 car insurance rate
62092 car insurance online
27800 car insurance new york
22934 car insurance online quote
16719 car geico insurance
15265 car cheapest insurance
9871 car insurance uk