Months after the UK's Independent Television Commission (ITC) upheld complaints about Apple's claims that the Power Mac G5 was the "world's fastest computer", the Council of Better Business Bureaus' National Advertising Division (NAD) in the US has also questioned Apple's claims regarding the Power Mac G5.

In a statement, NAD said it took issue with Apple's claim regarding the computer's 64-bit processor. It said: "The advertiser's claim, 'the world's first 64-bit processor for personal computers,' could reasonably be interpreted to apply to workstations, in the context in which it was presented."

According to NAD, this claim was unsupported by evidence. The organization recommended that Apple "modify this claim to effectively limit it to personal computers."

According to Cnet, NAD was tipped off by Dell.

A Dell representative told Cnet: "We notified NAD because we felt there were some inaccuracies in Apple's advertisement and wanted to act on behalf of consumers in the marketplace who deserve accurate information on which to base their purchase decisions… Essentially, we felt that clarity in the marketplace benefits consumers, and NAD agreed."

According to NAD, Apple said that its ad campaign has already run its course and that it "will be mindful of NAD's views in its future advertising."

Last November, complaints about Apple's Power Mac G5 TV advertisement were upheld by the Independent Television Commission (ITC).

The ad, screened in the first three weeks of September, claimed Apple's newest computer was the "world's fastest, most powerful personal computer". Apple backed up its findings in a White Paper published on its Web site.