AdWords Hijacking?

Is this possible?

[Lorel]

I've been watching a client's AdWords account because he's not getting any calls like usual. His average position is around 3 on all 4 words (either 2 or 3 word phrases), the budget and daily ad schedule is optimized for his best opportunity (east coast) during working hours, yet when we search Google for his site during optimum times of the day at eastern times his site is not showing up in search results. He is using up his daily clicks per day but it's not showing up in the site meter or in business calls.

I checked his sitemeter for the last 100 visitors which covers last 2 days and only found one Google search using his 4 main keywords and it was a very strange url. I'm wondering what the ?..... means on the end of what should have been a link to his website which should look like http://www.example.com/. See below:

http://www.example.com/?gclid=CJ6n-dG_wZwCFRghDQod8zlxmA

Is this some form of hijacking?

[LucidSW]

The gclid variable is one you ask to be automatically appended from your Adwords clicks. It is used for Analytics purposes.

[Lorel]

Ok, thanks.

[AdWordsAdvisor]

[...] yet when we search Google for his site during optimum times of the day at eastern times his site is not showing up in search results. [...]

As a quick aside: if you are checking for the ad by actually searching on Google.com, I would actually advise against it. Instead, I suggest using the Ad Preview tool which is discussed on this page from the AdWords Help Center:

Can I preview how my ad appears on Google?
[adwords.google.com...]

AWA