Adsense doesn't generate ads automatically. Advertisers write the ads and submit them to the network. If you have an Adwords account, you can create an ad that says just about anything.
Why is an Italian site displaying an ad in English? And why are the fonts so different between the iMac and and the ads below it? Hmmm... what could the answer be?
28 inch iMac for 1799? Not gonna happen.