By advertising I don’t mean what the checker puts out but what is in the advertisements, brochures, posters and on the front pages on the web.
See, for example, 5G, which was advertised as 2 Gbps on all possible channels, especially when it was introduced. And in Connect’s practical tests it was 10x less.
When it comes to WLAN, Swisscom is relatively cautious with the WB, but look at the advertising for other products. Up to 8 gigs are advertised. In a practical setting you get ⅒.
Ditto for memory sticks and SSDs. The specified writing speeds are determined using large test files; in practice, much less is achieved.
There is also fibbing in the automotive industry, but imagine how big the outcry would be if a car with Vmax. 200 and 6 liters of consumption advertised will in practice only achieve 40 kmh and would consume 30 liters of fuel.