Don't believe any specs unless full details are given of the international standard to which the tests conform to e.g. DIN, JIS, ASA. Those that dont do this, do not IMO have the confidence that the specs will withstand independent scrutiny, or alternatively the testing procedure was not rigorous enough. the problem is exacerbated by the proliferation of $2 websites conducting online reviews without the ability to independently test the equipment themselves. There are very few independent reviews these days "that keep the bastards honest".
The review site "Soundstage!" does have independent measurements conducted for equipment it reviews as does Australian Hifi and Stereophile. We know that measurements dont tell the full story but we also know some people can be seduced by them and the temptation is there for manufacturers to abandon standards and publish ambitious numbers, knowing that they will probably never be called to account.