We checked performance claims made by the guardian and where errors were identified these have been corrected.

In 2009 Paul Morland, a leading analyst, started raising concerns about Autonomy's exaggerated performance claims.

His performance claim is based on wind tunnel tests.

Q: Questions have been raised in the press about Forstmann Little's performance claims.

Blogs and forum posts regularly allege exaggerated membership and performance claims.

Unfortunately broad performance claims are common in the consumer marketplace, which are difficult or impossible for a typical consumer to verify.

More specifically, the agency explains that SAIC's assessed significant weaknesses reflected its failure to provide substantiating data to support its performance claims.

There is no substantiating data to demonstrate that the system meets performance claims.

Other research backs up the improved performance claims.

But Apple will not stand still either, so look for dueling performance claims.